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First-hand information. Entered by James Robinson at registration.
Paternal relationship is confirmed by a Family Tree DNA Family Finder test match between James Calvert Robinson and his father George Calvert Robinson. Predicted relationship from FTDNA: Father/Son, based on sharing 3384 cM.
It may be possible to confirm family relationships by comparing test results with James or other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Family Tree DNA Y-DNA Test 37 markers, haplogroup G-M201, FTDNA kit #435585