То есть Джексон патернально восходит к бургундским Ришбурам?
Да, в группах ftdna есть R-FT121274 у которого указан предок Ришбур из 1670 года
https://www.familytreedna.com/public/weatherby?iframe=yresultshttps://www.wikitree.com/wiki/Richbourg-43А тут самое интересное есть:
may be possible to confirm family relationships with Claude by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA. Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
John Richburg Find Relationship : Family Tree DNA Y-DNA Test 111 markers, haplogroup R-FT121274, FTDNA kit #758218
Thomas Jackson III Find Relationship : Family Tree DNA Y-DNA Test 111 markers, haplogroup R-FT121435, FTDNA kit #B917524