2
What other ethnic ancestries do these 3 East Slavic nations have, apart from Slavic?
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By the way:
Linguists estimate that Proto-Slavic language split from the Proto-Balto-Slavic continuum between 4000 and 2500 years ago (2000-500 BC). First divisions within Proto-Slavs could take place even before 100 AD:
http://journals.plos.org/plosone/art...=supplementary
Quote: "(...) Our consensus tree (Fig. G in S2 File) suggests the following topological and temporal reconstruction of the Balto-Slavic languages. Initial disintegration of proto-Balto-Slavic into proto-East Baltic and proto-Slavic took place during the 2nd millennium BC*. Proto Slavic splits into three major clades, East, West, South Slavic around year 100 AD (1900 Years Before Present). Further diversification of each clade into minor clades (i.e. proto-East Slavic: Ukrainian/Belarusian, Russian; proto-West Slavic: Czech/Slovak, proto-Sorbian, Polish/Kashubian; proto-South Slavic: Serbo-Croatian, Bulgarian, Macedonian) took place during the 5th–7th centuries AD (about 1500–1300 YPB), followed by final shaping of individual languages (1000–500 YBP). (...)"
*There was also proto-West Baltic as a 3rd branch (or maybe closer to Proto-Slavic?).
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Edit:
But Baltic N1c as well as Swedish N1c are descended from Uralic N1c, in my opinion. Of course those were founder effects. This is how I see it (Uralic N1c is ancestral to Rurikid and Baltic N1c, which are both sub-branches of Uralic L1026). All of L1026+ was originally Proto-Uralic, IMO:
https://s14.postimg.org/li0admzzl/N1c1a1.png
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Edit:
Bronze Age Balts: https://www.nature.com/articles/s41467-018-02825-9
As you can see, Bronze Age Balts were even "more Baltic" than modern Balts:
PCA and ADMIXTURE analysis reflecting three time periods in Northern European prehistory. a Principal components analysis of 1012 present-day West Eurasians (grey points, modern Baltic populations in dark grey) with 294 projected published ancient and 38 ancient North European samples introduced in this study (marked with a red outline). Population labels of modern West Eurasians are given in Supplementary Fig. 7 and a zoomed-in version of the European Late Neolithic and Bronze Age samples is provided in Supplementary Fig. 8. b Ancestral components in ancient individuals estimated by ADMIXTURE (k = 11)
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