Jochi--son of Genghis--read Conn Iggulden's Mongol Series. Yes, it's Jochi's tomb in Kazakhstan.

From Jochi wiki Genetic paternity evidence In 2019, researchers uncovered genetic evidence supporting the claim that Jochi was Genghis Khan's first true-born son. Scientists found that the Lu clan of Northwestern China, which claimed descent from the sixth son of Genghis Khan Toghan, largely belonged to a Y-chromosomal haplogroup (C2b1a1b1-F1756) closely related to one frequently found in the Tore clan from Kazakhstan which claimed descent from Jochi with the time of divergence ~1000 years ago. This result could however, also arise by different avenues of shared paternity or by Y-chromosomal sharing between Chilger Bökh and Genghis Khan.[6] Legacy