https://en.wikipedia.org/wiki/Sviatopolk_I_of_Kiev
https://en.wikipedia.org/wiki/Haplogroup_I-Z63
''The I-S2077 subclade of Y-DNA haplogroup I-Z63 was sampled on an elite warrior buried in Bodzia (Poland) in a rich burial from ca. 1010-1020 AD. All artefacts there indicate a strong relation to the Kievan Rus' ruling elite, so this man who probably succumbed to combat wounds, was in a close relationship with Sviatopolk. The cemetery in Bodzia is exceptional in terms of Scandinavian and Kievan Rus' links. The Bodzia man (sample VK157, or burial E864/I) was not a simple warrior from the princely retinue, but he belonged to the princely family himself. His burial is the richest one in the whole cemetery, and strontium analysis of his tooth enamel shows he was not local. It is assumed that he came to Poland with Sviatopolk, and met a violent death in combat. This corresponds to the events of 1018 AD when Sviatopolk himself disappeared after having retreated from Kiev to Poland. It cannot be excluded that the Bodzia man was Sviatopolk himself.[2][3][4]''
https://en.wikipedia.org/wiki/Haplogroup_I-Z63
''The I-S2077 subclade of Y-DNA haplogroup I-Z63 was sampled on an elite warrior buried in Bodzia (Poland) in a rich burial from ca. 1010-1020 AD. All artefacts there indicate a strong relation to the Kievan Rus' ruling elite, so this man who probably succumbed to combat wounds, was in a close relationship with Sviatopolk. The cemetery in Bodzia is exceptional in terms of Scandinavian and Kievan Rus' links. The Bodzia man (sample VK157, or burial E864/I) was not a simple warrior from the princely retinue, but he belonged to the princely family himself. His burial is the richest one in the whole cemetery, and strontium analysis of his tooth enamel shows he was not local. It is assumed that he came to Poland with Sviatopolk, and met a violent death in combat. This corresponds to the events of 1018 AD when Sviatopolk himself disappeared after having retreated from Kiev to Poland. It cannot be excluded that the Bodzia man was Sviatopolk himself.[2][3][4]''