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Elwood Cox's DNA has been tested for genealogical purposes. It may be possible to confirm family relationships by comparing test results with Elwood or other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Jeffrey Cox :
Family Tree DNA Y-DNA Test 37 markers, haplogroup I-M253, Ysearch A69BT, FTDNA kit #B84054 +
Y-Chromosome Test, haplogroup I-CTS6017
It is likely that these autosomal DNA test-takers will share DNA with Elwood: