Why is German_Hamburg population so mixed

[Peterski]

German_Hamburg from the G25 spreadsheet looks like a mixture of Germanic, Slavic and Celtic ancestries, rather than pure Germanics:

Target: German_Hamburg
Distance: 0.8494% / 0.00849382
52.4 Germany_Lubeck_LateMedieval_N=5
29.0 Germany_Krakauer_Berg_AD_1099_1351_N=11
18.6 Germany_Hallstatt_Celts_490_BC_Cov>25%N=6

Is it because they are random patients from a hospital in Hamburg rather than people with confirmed 4/4 grandparents from Hamburg?

=====

SOURCE:

https://vahaduo.github.io/vahaduo/


Germany_Lubeck_LateMedieval_N=5,0.131352,0.132425, 0.0632052,0.051357,0.037853,0.0199128,0.0036662,0. 005492,0.0076492,-0.002442,-0.0063656,0.0050954,-0.006333,-0.0077618,0.0224482,0.0107926,-0.004146,0.0014444,0.0006538,0.0036016,0.0025206,0 .0015334,0.0027362,0.0150624,0.0001916
Germany_Hallstatt_Celts_490_BC_Cov>25%N=6,0.1291893,0.1477595,0.0507227,0.0178727,0.0 456495,0.00753,0.0045042,0.0039615,0.0137032,0.024 9663,-0.0014615,0.0072435,-0.015089,-0.0074088,0.0018775,-0.0034693,-0.003216,0.0019425,0.0007122,-0.0059403,0.0022877,0.0058528,-0.002773,-0.00486,0.0022752
Germany_Krakauer_Berg_AD_1099_1351_N=11,0.1292408, 0.1278645,0.0744299,0.0667435,0.0442321,0.0231226, 0.0087166,0.012545,-0.0003718,-0.0232598,-0.00248,-0.0092645,0.0149742,0.0188792,-0.0083037,0.0013741,0.0066141,-0.0015894,0.0034395,0.003297,-0.0047075,-0.0031365,0.0046274,-0.0053785,0.0002395

TARGET:


German_Hamburg,0.128285,0.13399,0.063467,0.048526, 0.040062,0.020375,0.007562,0.009108,0.00296,-0.003559,-0.003878,8.8e-05,-0.00251,0.000753,0.009436,0.003268,-0.004556,0.002556,0.003993,0.000684,0.00174,0.0015 57,0.002719,0.00735,-0.001035

[J. Ketch]

Does Wesolowski have some kind of an agenda in putting such ridiculously inaccurate averages in his G25?

[Peterski]

Does Wesolowski have some kind of an agenda in putting such ridiculously inaccurate averages in his G25?

Well it is not entirely his fault, someone sent him these samples and he agreed to add them. But Hamburg and Erlangen samples are just patients from hospitals in Hamburg and in Erlangen. They are not samples with verified genealogy.

[Peterski]

Modern Hamburg is clearly shifted towards Slavs (and also shifted towards Southern Europe) compared to Late Medieval Lubeck:

https://i.imgur.com/hoHOWzq.png

https://i.imgur.com/hoHOWzq.png

[rothaer]

Well it is not entirely his fault, someone sent him these samples and he agreed to add them. But Hamburg and Erlangen samples are just patients from hospitals in Hamburg and in Erlangen. They are not samples with verified genealogy.

I even told Davidski that but he added them as well. The same goes for a Stockholm hospital group and a group of Danes of an unknown to me source. He told to have removed outliers but it’s still pretty arbitrary as both the Hamburg Eppendorf female cancer hospital as well as the Erlangen heart clinic do have an overregional importance.

[Peterski]

I even told Davidski that but he added them as well. The same goes for a Stockholm hospital group and a group of Danes of an unknown to me source. He told to have removed outliers but it’s still pretty arbitrary as both the Hamburg Eppendorf female cancer hospital as well as the Erlangen heart clinic do have an overregional importance.

Even if they had just regional importance they could still include many Eastern Germans who now live in Hamburg.

Because a lot of people from for example former East Prussia moved to Hamburg and Schleswig-Holstein after 1945.

[rothaer]

It’s a little bit unclear what being 4/4 from Hamburg means at the end of the day as essentially most people are descendants of (German) immigrants to Hamburg. To me it would make more sense to refer to the surrounding countryside in such a context.

[rothaer]

Even if they had just regional importance they could still include many Eastern Germans who now live in Hamburg.

Because a lot of people from for example former East Prussia moved to Hamburg and Schleswig-Holstein after 1945.

Absolutely.

[cass]

Modern Hamburg is clearly shifted towards Slavs (and also shifted towards Southern Europe) compared to Late Medieval Lubeck:

https://i.imgur.com/hoHOWzq.png

https://i.imgur.com/hoHOWzq.png


What is the guarantee that MA Lubeck is representative of the region?

[Peterski]

It’s a little bit unclear what being 4/4 from Hamburg means at the end of the day as essentially most people are descendants of (German) immigrants to Hamburg. To me it would make more sense to refer to the surrounding countryside in such a context.

Here is example of a German "really from Hamburg" :) whom I found on GEDmatch:

Kit number: H649776

http://i.imgur.com/xKwDQsV.png

His Eurogenes K13 results:

Admix Results (sorted):

# Population Percent
1 North_Atlantic 50.83
2 Baltic 28.92
3 West_Med 8.41
4 East_Med 4.04
5 West_Asian 3.93
6 Red_Sea 1.33
7 South_Asian 1.32
8 Siberian 0.62
9 Northeast_African 0.45
10 Amerindian 0.15

Least-squares:

Single Population Sharing:

# Population (source) Distance
1 Norwegian 3.23
2 Danish 3.46
3 North_Dutch 3.96
4 Swedish 4.18
5 North_German 4.81
6 Orcadian 5.97
7 Irish 6.66
8 West_Scottish 6.93
9 Southeast_English 7.36
10 Southwest_English 8.79
11 North_Swedish 9.44
12 South_Dutch 10.95
13 West_German 11.52
14 East_German 13.58
15 Austrian 13.88
16 French 16.91
17 Southwest_Finnish 17.67
18 Hungarian 17.74
19 South_Polish 21.36
20 Croatian 22.91

Mixed Mode Population Sharing:

# Primary Population (source) Secondary Population (source) Distance
1 81.1% Danish + 18.9% North_Swedish @ 2.75
2 97.7% Norwegian + 2.3% Yemenite_Jewish @ 2.76
3 97.9% Norwegian + 2.1% Saudi @ 2.87
4 61.1% Danish + 38.9% Swedish @ 2.87
5 90.4% Danish + 9.6% Southwest_Finnish @ 2.92
6 97.9% Norwegian + 2.1% Egyptian @ 2.95
7 98.3% Norwegian + 1.7% Ethiopian_Tigray @ 2.96
8 92.9% Danish + 7.1% La_Brana-1 @ 2.96
9 92.8% Danish + 7.2% Finnish @ 2.96
10 98.4% Norwegian + 1.6% Ethiopian_Amhara @ 2.97
11 58.3% Norwegian + 41.7% Danish @ 2.97
12 98.1% Norwegian + 1.9% Palestinian @ 3
13 98.1% Norwegian + 1.9% Bedouin @ 3
14 77.8% North_Dutch + 22.2% North_Swedish @ 3.02
15 98.2% Norwegian + 1.8% Lebanese_Druze @ 3.03
16 98.2% Norwegian + 1.8% Jordanian @ 3.04
17 94.2% Danish + 5.8% East_Finnish @ 3.04
18 98.7% Norwegian + 1.3% Ethiopian_Oromo @ 3.05
19 93.8% Danish + 6.2% Estonian @ 3.05
20 98.1% Norwegian + 1.9% Libyan_Jewish @ 3.05

Gaussian:

Using 2 populations approximation:
1 50% Danish +50% Swedish @ 3.257537

Using 3 populations approximation:
1 50% Danish +25% Norwegian +25% Swedish @ 3.142092

Using 4 populations approximation:
1 Danish + Danish + Norwegian + Swedish @ 3.142092
2 Danish + Danish + North_Swedish + West_Scottish @ 3.159508
3 Danish + Danish + Danish + North_Swedish @ 3.163684
4 Danish + Danish + North_Dutch + North_Swedish @ 3.172780
5 Danish + Danish + North_Swedish + Norwegian @ 3.178333
6 Danish + North_Swedish + Norwegian + West_Scottish @ 3.200292
7 Danish + Norwegian + Norwegian + Swedish @ 3.237297
8 Danish + North_Dutch + North_Dutch + North_Swedish @ 3.239144
9 Danish + North_Dutch + North_Swedish + Norwegian @ 3.248334
10 Danish + Danish + Swedish + Swedish @ 3.257537
11 Danish + North_Dutch + North_Swedish + West_Scottish @ 3.273475
12 Danish + Danish + Danish + Swedish @ 3.273919
13 Danish + North_Swedish + Norwegian + Southeast_English @ 3.288378
14 Danish + North_Dutch + Norwegian + Swedish @ 3.294572
15 Danish + Danish + Norwegian + Norwegian @ 3.314415
16 Danish + Danish + North_Swedish + Orcadian @ 3.328635
17 Danish + North_Swedish + Norwegian + Orcadian @ 3.350953
18 Danish + Danish + Irish + North_Swedish @ 3.351072
19 Danish + North_Dutch + Swedish + Swedish @ 3.355464
20 North_Swedish + Norwegian + Norwegian + Southeast_English @ 3.355885

===================

His Eurogenes K36 results and Similitude Map:

Population
Amerindian -
Arabian -
Armenian -
Basque 0.80
Central_African -
Central_Euro 9.80
East_African -
East_Asian -
East_Balkan 3.21
East_Central_Asian -
East_Central_Euro 10.24
East_Med -
Eastern_Euro 5.35
Fennoscandian 13.66
French 6.82
Iberian 4.64
Indo-Chinese -
Italian 8.65
Malayan -
Near_Eastern -
North_African -
North_Atlantic 13.45
North_Caucasian -
North_Sea 23.37
Northeast_African -
Oceanian -
Omotic -
Pygmy -
Siberian -
South_Asian -
South_Central_Asian -
South_Chinese -
Volga-Ural -
West_African -
West_Caucasian -
West_Med -

http://i.imgur.com/2Oawbxh.png

[Peterski]

What is the guarantee that MA Lubeck is representative of the region?

It is representative of the city of Lubeck perhaps, not necessarily of entire region around it.

There were some Slavs living near Lubeck as late as the 15th century, check in this thread:

https://www.theapricity.com/forum/showthread.php?248977-Can-someone-translate-this-Greek-text-to-English


I have visited many countries in Europe, and traveled all of its coast in the Hyperborean Sea. There is a large bay, called in Greek Uenedikos (“Venedic”, the Baltic Sea). Its circumference is 4000 miles and its diameter from the northern tip of the so-called Cape of Norway (Νορβεγία) to the farthest corner of the land of Prussia (Πουρσία) is 2000 Italian miles, where a mile is 1000 yards [сажень, клафтер]. In our reckoning, a mile is 750 yards, so it is 2250 miles. From east and west, it covers […]

First of all, starting from the east, the most northern part of the country around the Gulf is Norway, which has a capital that is called Bergen Vågen (Μπέργεν Βάγεν). [Vågen is a bay in the centre of Bergen.] In this city there are no hammered coins in circulation, either gold, silver, copper, or iron: buyers and seller exchange livestock. Furthermore, in this city day lasts a month, from June 24 until July 25 is continuous daytime, and there is no night at all.

After this country is the country of Sweden (Σουητζία), which has the capital of Stockholm (Στοκολμώ). In this city silver coins are minted. Both countries are governed by the King of Denmark (Δατία).

After Sweden comes the country of Livonia (Λιβονία). This country has a major city called Riga (Ρήγα) and another called Revel (Ρηβούλη, now Tallinn). These (cities) are controlled by bishops in both secular and ecclesiastical matters. The country is controlled by the Prince Grand Master of the white robes and black cross.

After this country in the inner corner of the bay is the country of Prussia. It has a capital called Danzig (Τάντζηκ).

After this is the country of Slavonia (Σθλαβουνία), which has a capital called Lubeck (Λούπηκ). From this country the Zygiotai (Ζυγιῶται) in the Peloponnese have originated, because there is a large number of small towns [in Slavonia], where they speak the dialect of the Zygiotai.

Next to that country is the country of Denmark, which has a city called Copenhagen (Κουπανάβη). It serves as the residence of the King of Denmark.

These are the six countries that lie around the bay.

I have also been to the islands of the Fish-Eaters (Ἰχθυοφάγοι), which are usually called Iceland (Ἰσλάντη), but for the wise Ptolemy, I believe, this was Thule. There I found the day lasted six months from the beginning of spring until the autumn solstice. I went to the islands from England (Ἠγγληνία). It is a voyage of 1000 miles, and I was there for 24 days. And I saw a strong and sturdy people; their food was fish, and their bread was fish, and their drink was water. Then I returned back to England (Ἐγγλιτέρα).

The distance in miles in a straight line from the aforementioned city of Bergen-Vågen to Sluis (Κλούτζη), in the south of Flanders, is 3500 miles, and from the Sluis to the Holy Cape [Promontorium Sacrum, Cape St. Vincent] in Portugal is 2064 [2164?] Miles, which is a total of 5664 miles [yes, I know that doesn’t add up], if you don’t count going into the harbours.

And there were also Hanoverian Wends nearby:

https://genarchivist.net/showthread.php?tid=660

[Not a Cop]

It is representative of the city of Lubeck perhaps, not necessarily of entire region around it.

There were some Slavs living near Lubeck as late as the 15th century, check in this thread:

https://www.theapricity.com/forum/showthread.php?248977-Can-someone-translate-this-Greek-text-to-English



And there were also Hanoverian Wends nearby:

https://genarchivist.net/showthread.php?tid=660

I mean, shouldn't Hamburg area have some degree of Slavicness originally?

[cass]

I mean, shouldn't Hamburg area have some degree of Slavicness originally?

Certainly, but we do not know whether the samples can be accepted a priori as native.


German_Hamburg:GSM1031510,0.135449,0.141159,0.0626 02,0.051357,0.035391,0.025379,0.014571,0.008538,0. 001227,-0.013668,-0.008607,0.002248,-0.007433,0.004954,0.016015,0.009812,-0.010691,-0.001014,-0.002514,-0.004502,0.004243,0.000495,0.003697,0.006627,-0.001796
German_Hamburg:GSM1031511,0.130897,0.129988,0.0554 37,0.040698,0.032621,0.010598,0.000235,0.012461,0. 00409,-0.002916,-0.000162,-0.000749,-0.005946,-0.009083,0.007329,0.011535,0.015907,0.004434,0.007 29,0.016633,-0.004243,0.002597,0.002835,0.009399,-0.002155
German_Hamburg:GSM1031512,0.118376,0.132019,0.0561 91,0.053295,0.045547,0.0251,0.007285,0.008077,0.00 0205,-0.000364,-0.001461,0.000599,-0.008771,-0.017203,0.025244,0.014717,0.006389,0.003421,0.006 662,-0.002001,0.001248,0.007419,-0.0053,0.017352,-0.001916
German_Hamburg:GSM1031513,0.129758,0.135065,0.0554 37,0.049419,0.041854,0.01757,-0.002585,0.007154,0.0045,0.001458,-0.003897,0.003597,-0.002379,-0.004266,0.018729,-0.004641,-0.017863,0.007981,0.004022,-0.001,0.001747,0.001607,0.002095,0.009158,0.002994
German_Hamburg:GSM1031514,0.122929,0.131003,0.0818 35,0.070091,0.0397,0.032351,0.00282,0.010615,0.002 25,-0.020957,-0.002923,-0.001499,0.004014,0.024634,-0.001629,-0.007425,-0.007171,0.000507,0.001508,-0.006753,-0.002496,-0.00643,0.007148,0.003615,-0.003113
German_Hamburg:GSM1031515,0.121791,0.140143,0.0701 44,0.044897,0.048009,0.013108,0.010105,0.014076,0. 004295,0.002734,-0.011692,-0.004646,0,-0.012524,0.006107,0.006762,-0.001565,-0.000507,0.010182,0.003877,0.005116,0.009398,0.001 725,-0.000843,0.000838
German_Hamburg:GSM1031516,0.122929,0.127957,0.0607 16,0.057494,0.040315,0.014781,0.011281,0.007846,-0.004295,-0.010934,-0.00341,-0.003897,0.006987,-0.001101,0.003936,0.017104,0.0103,0.003041,0,0.011 506,0.001996,0.003833,0.000739,-0.004579,0.007424
German_Hamburg:GSM1031517,0.132035,0.135065,0.0592 08,0.041344,0.046162,0.016455,0.007755,0.002538,0. 012067,-0.00656,-0.002111,0.004946,-0.001933,-0.002752,0.007193,0.023866,0.023469,0.004434,0.004 022,-0.003252,-0.004991,0.005812,-0.000986,0.010965,-0.00479
German_Hamburg:GSM1031519,0.135449,0.126941,0.0588 31,0.033915,0.033237,0.013387,0.00517,0.010615,-0.000818,-0.001822,-0.004872,-0.001199,-0.007433,0.004817,-0.0076,0.00053,0.002738,-0.00076,-0.002765,-0.000625,-0.008111,-0.006554,0.001725,0.009158,-0.000479
German_Hamburg:GSM1031521,0.134311,0.142174,0.0584 54,0.044251,0.041546,0.01757,0.0094,0.006,0,0.0061 96,-0.00341,-0.002847,-0.013082,-0.000688,0.005972,-0.00716,-0.021644,-0.00038,0.002011,-0.005002,0.002371,0.001237,0.001356,0.014701,0.010 538
German_Hamburg:GSM1031523,0.138864,0.136081,0.0686 36,0.04845,0.035699,0.022311,0.007755,0.008307,0.0 00614,-0.009112,-0.004384,0.002248,0.002825,0.016377,-0.000407,0.001061,0.001173,0.002914,0.003268,0.004 877,0.004367,-0.001113,0.001725,0.00735,0.002036
German_Hamburg:GSM1031524,0.121791,0.132019,0.0648 65,0.060724,0.044008,0.018128,0.015276,0.011769,-0.003886,-0.002916,-0.001949,0.003147,0.005649,0.007432,0.019001,0.001 326,-0.010952,0.004054,0.009804,0.003627,0.006489,0.006 801,0.010353,0.013857,-0.000239
German_Hamburg:GSM1031525,0.121791,0.13405,0.06561 9,0.044897,0.0397,0.018407,0.015981,0.009,0.008795 ,0.001276,0.000974,-0.001948,-0.006987,-0.012248,0.011129,0.001326,0.000522,0.008488,0.008 547,-0.003502,0.001622,-0.005564,0,0.005061,-0.011496
German_Hamburg:GSM1031526,0.122929,0.138112,0.0633 56,0.040375,0.045547,0.020638,0.00188,0.011999,0.0 00614,0.000182,-0.008607,0.003897,-0.002527,0.001376,0.016558,-0.013126,-0.018775,0.003041,0.011564,-0.002751,0.00287,0.005935,0.006162,0.006627,-0.005868
German_Hamburg:GSM1031527,0.12862,0.136081,0.07768 7,0.055233,0.040007,0.028168,0.011751,0.011769,0.0 0409,-0.005649,0.002598,-0.002098,0.004608,0.022295,0.0019,-0.007823,-0.018645,0.004181,-0.002765,-0.007754,0.002745,0.000989,0.01023,-0.000723,-0.012574
German_Hamburg:GSM1031529,0.125205,0.128972,0.0626 02,0.042313,0.042162,0.026495,0.00141,0.008077,0.0 07772,-0.001458,-0.005196,0.00015,-0.001189,-0.000826,0.016015,0.000133,-0.029336,-0.002914,0.011061,-0.000875,0.005241,-0.000495,-0.001849,0.004458,0.001916
German_Hamburg:GSM1031548,0.137726,0.131003,0.0573 22,0.046189,0.029544,0.025937,0.00846,0.006,0.0087 95,0.004009,-0.00682,-0.00045,-0.009068,-0.008395,0.014929,0.007558,-0.001304,0.002534,-0.004022,0.009129,0.009358,0.000495,0.00456,0.0127 73,0.001078



At least two of them are more Slavic than me
German_Hamburg:GSM1031514 0.02443451

German_Hamburg:GSM1031527 0.02853041



Three more are close to German East
German_Hamburg:GSM1031516

German_Hamburg:GSM1031523

German_Hamburg:GSM1031519

And one is clearly southern
German_Hamburg:GSM1031517

[Peterski]

Yeah, it is impossible that GSM1031514 is native to Hamburg and neighbouring areas.

[Peterski]

I mean, shouldn't Hamburg area have some degree of Slavicness originally?

Yes, it depends on how far the genes of these Slavs diffused:

https://i.imgur.com/nNDq2Km.png

https://i.imgur.com/PRTDEUq.png

https://i.imgur.com/qd4TGyA.png

But the GEDmatch Hamburg German is not Slavic-admixed.

[cass]

https://i.ibb.co/nsq1ccGW/Zrzut-ekranu-9-2-2025-2107-vahaduo-github-io.jpg (https://ibb.co/5WXj8807)



On the other hand, in some Danish samples we also have a clear Slavic and continental deviation.

[Not a Cop]

Yeah, it is impossible that GSM1031514 is native to Hamburg and neighbouring areas.

But then again i stand on my point that pre WWII Hambuergers would be interesting to see, but it's an ancient population at this point. Post WWII migrations affected the area so strong that genetics are now completly changed, as thoose people are now fully integrated, assimilated and spread among the population .

https://denkmal.agenturkomma.de/ausstellung-fluechtlinge-in-radeburg/themenbereich-1/

[YangWenli]

A lot of modern Germans are practically just Slavic mutts at this point it seems like

[rothaer]

A lot of modern Germans are practically just Slavic mutts at this point it seems like

Why "just"? This is called Germans since half a millenium.

[Your Old Comrade]

Hamburg is a port city. The population comes from all over the place. Amsterdam is no different.

[rothaer]

Yes, it depends on how far the genes of these Slavs diffused:

https://i.imgur.com/nNDq2Km.png

https://i.imgur.com/PRTDEUq.png

But the GEDmatch Hamburg German is not Slavic-admixed.

You focus on something that was a Slavic pretty lately. But genetically relevant seems what at all at some point was Slavic settled. And there are other big and close to Hamburg areas (blue).

https://i.imgur.com/g147CKI.jpeg

[Peterski]

You focus on something that was a Slavic pretty lately. But genetically relevant seems what at all at some point was Slavic settled. And there are other big and close to Hamburg areas (blue).

https://i.imgur.com/g147CKI.jpeg

Yes, I agree. BTW that's a very nice map!

[Opie]

German_Hamburg from the G25 spreadsheet looks like a mixture of Germanic, Slavic and Celtic ancestries, rather than pure Germanics:

Target: German_Hamburg
Distance: 0.8494% / 0.00849382
52.4 Germany_Lubeck_LateMedieval_N=5
29.0 Germany_Krakauer_Berg_AD_1099_1351_N=11
18.6 Germany_Hallstatt_Celts_490_BC_Cov>25%N=6

Is it because they are random patients from a hospital in Hamburg rather than people with confirmed 4/4 grandparents from Hamburg?

=====

SOURCE:

https://vahaduo.github.io/vahaduo/


Germany_Lubeck_LateMedieval_N=5,0.131352,0.132425, 0.0632052,0.051357,0.037853,0.0199128,0.0036662,0. 005492,0.0076492,-0.002442,-0.0063656,0.0050954,-0.006333,-0.0077618,0.0224482,0.0107926,-0.004146,0.0014444,0.0006538,0.0036016,0.0025206,0 .0015334,0.0027362,0.0150624,0.0001916
Germany_Hallstatt_Celts_490_BC_Cov>25%N=6,0.1291893,0.1477595,0.0507227,0.0178727,0.0 456495,0.00753,0.0045042,0.0039615,0.0137032,0.024 9663,-0.0014615,0.0072435,-0.015089,-0.0074088,0.0018775,-0.0034693,-0.003216,0.0019425,0.0007122,-0.0059403,0.0022877,0.0058528,-0.002773,-0.00486,0.0022752
Germany_Krakauer_Berg_AD_1099_1351_N=11,0.1292408, 0.1278645,0.0744299,0.0667435,0.0442321,0.0231226, 0.0087166,0.012545,-0.0003718,-0.0232598,-0.00248,-0.0092645,0.0149742,0.0188792,-0.0083037,0.0013741,0.0066141,-0.0015894,0.0034395,0.003297,-0.0047075,-0.0031365,0.0046274,-0.0053785,0.0002395

TARGET:


German_Hamburg,0.128285,0.13399,0.063467,0.048526, 0.040062,0.020375,0.007562,0.009108,0.00296,-0.003559,-0.003878,8.8e-05,-0.00251,0.000753,0.009436,0.003268,-0.004556,0.002556,0.003993,0.000684,0.00174,0.0015 57,0.002719,0.00735,-0.001035

Has inner immigration ever crossed your mind? Even ones that are centuries ago.

[Opie]

You focus on something that was a Slavic pretty lately. But genetically relevant seems what at all at some point was Slavic settled. And there are other big and close to Hamburg areas (blue).

https://i.imgur.com/g147CKI.jpeg

I'd assume Schleswig Holstein would be Danish influenced both culturally and genetically.