The Book of Dow lists a Willis O. Dow b. 1833, laborer, widower who d. Tremont 11 Sep 1901 at age 67-11-3. In 1861 he was a farmer. He m. Rhoda A. Murphy who d. 24 Jul 1894 at age 54-0-20, dau of Joshua Murphy and Lois Butters. Don't know how many children - 2 in book are Willis E Dow who m. Agnes M Trundy, and Stephen B. who died unmarried at age 23.
Willis O. Dow was the son of Samuel Dow and Mary Stewart.The book traces the Dow line back several generations, although it is not clear that the author was sure of all the connections.The Book of Dow is a handy reference for Dow ressearch, but the author does make "guesses" in some areas, so all material should be verified independently.