The three men are John Moreland Whitelaw (1911-1974), his father John Whitelaw, Jr. (1870-1961), and John Moreland Whitelaw, Jr. (1939-). All three carry the Whitelaw y-chromosome DNA. In front is John Whitelaw Rieke, whose mother is a Whitelaw. He does not carry the y-chromosome DNA because it only passes from father to son, but, like all the Whitelaw family, he has inherited Whitelaw genes in other parts of his DNA.