Eric Allen Clark is the tenth great grandson of William Wilcoxson (1601-1652) and Margaret Birdseye Wilcoxson (1611-1675) who, in 1635, were the first members of the Wilcox branch of the family to emigrate from England to what is now the United States. He is also the third great grandson of Ludwik Lieberatzka (b. 1840) and the great grandson of Alexander Joseph Liberacki (1908-1959) and Rachel Olive Wilcox (1909-1990).