https://www.academia.edu/3640214/Scandinavian_origin_of_the_Rurikid_N1c1_lineage
>Scandinavian origin of the Rurikid N1c1 lineage
>1. Historical evidence – The Primary Chronicle (The Tale of Bygone Years) tells that a Scandinavian Varangian called Rurik (Old East Norse: Rørik) was invited to rule the early Rus' state.
>2. Linguistic evidence – Some person names of the ruling family of the early Rus' have Scandinavian etymology: Oleg Helge, Igor Ingvar, Olga Helga.
>3. Genetic evidence – The Rurikid prince families, who belong to the haplogroup N1c1 and derive their paternal lineage from Rurik, seem to descend from Scandinavia.

https://www.eupedia.com/europe/Haplogroup_N1c_Y-DNA.shtml
>The Y-DNA from the Proto-Rurikid branches is N1c1 and matches the distinctive haplotype of the Monomakhoviches. Furthermore, this N1c1 haplotype possess the distinctive value DYS390=23, found in Scandinavia but not in Uralic populations, confirming that this was indeed the original haplotype of the Varangian prince Rurik (c. 830-c. 879) who established the Kievan Rus'.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10615192/
>The reconstruction of the genome of Prince Dmitry Alexandrovich indicates the contribution of three ancestral components to his origin: (1) the early medieval population of the east of Scandinavia from the island of Oland, (2) representatives of the steppe nomadic peoples of the Eurasian steppes of the Iron Age or the early medieval population of central Europe (steppe nomads from the territory of Hungary), and (3) the ancient East-Eurasian component