The earliest Russell in the HHH book by E. Chas. HINCKLEY was s/o Gideon HINCKLEY, b. ca. 1728, Rev. War soldier, who married by 1756, Mary RUSSELL. The son Russell HINCKLEY, b. 27 Feb. 1765, ME, m. May 1790, cousin Reliance TIBBETTS (apparently too late for your Wm. E.)
What is the source of the information that Wm. E. was born in Hebron, CT? There are several Williams born about that time on FamilySearch, not in Hebron, though.