Unfortunately I don’t find it now(I should be able to find a source, though) but I want to make clear my statement:
1. There was a litte Germanic tribe called Eotas at the Rhine mouth.
2. The archaeological material culture of the Germanic settlers in areas that traditionally are considered settled by Jutes (f. i. East Kent) show more Roman influence than those considered settled by non-Jutes.
As for the latter I found this in the English Wikipedia (emphasis by me):
"Although not all historians accept Bede's scheme for the settlement of Britain into Anglian, Jutish and Saxon areas as perfectly accurate,[36] the archaeological evidence indicates that the peoples of west Kent were culturally distinct from those in the east of Kent, with west Kent sharing the 'Saxon' characteristics of its neighbours in the south east of England.[37] Brooches and bracteates found in east Kent, the Isle of Wight and southern Hampshire showed a strong Frankish and North Sea influence from the mid-fifth century to the late sixth century compared to north German styles found elsewhere in Anglo-Saxon England.[39][37][40] There is discussion about who crafted the jewellery (found in the archaeological sites of Kent). Suggestions include crafts people who had been trained in the Roman workshops of northern Gaul or the Rhineland. It is also possible that those artisans went on to develop their own individual style.[41] By the late 6th century grave goods indicate that west Kent had adopted the distinctive east Kent material culture.[37]"
https://en.wikipedia.org/wiki/Jutes
I agree that a neighborhood would make sense and also this is pointing against an origin of the immigrants in Jutland. Because many if not most of the Saxons or what was called Saxons came from just across the English channel.
I found this in the German Wikipedia article on the Saxon Shore:
„In Britannien eingewanderte germanische Stämme haben zum Teil früher an den Rheinmündungen, um Bononia (Boulogne-sur-Mer) oder im Gebiet des bis heute unbekannten Grannona (entweder bei Granville oder Port-en-Bessin-Huppain) gesiedelt, auch dort wurde diese Region als litus Saxonicum, als eine von den Stammesangehörigen der Sachsen bewohnte Küste bezeichnet.[5“
„Translation: Some of the Germanic tribes that migrated into Britain had previously settled at the mouths of the Rhine, around Bononia (Boulogne-sur-Mer) or in the area of Grannona (either near Granville or Port-en-Bessin-Huppain), which is still unknown today; this region was also referred to as litus Saxonicum, a coast inhabited by the Saxon tribesmen.[5“
https://de.wikipedia.org/wiki/Sachsenk%C3%BCste
Also, the onomast (place name linguist) Jürgen Udolph has examined what Germanic name types show up where and came to the conclusion that the imported to Britain Germanic place name types do not have their corresponding sources in Jutland and Schleswig-Holstein but in more continental Germania and among that pretty much in Flanders and in Northern France.
Maybe you can access this article of his in English:
https://benjamins.com/catalog/cilt.321.02udo
I have it in German as a PDF file. Another pic is this showing the distribution of wik place names.
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