I think Cullen/Cullin Wilder is the son of William Henry Wilder b. 1848 Jackson (now Lincoln) Par., LA, and died before 1910.
William Henry Wilder is the son of Jehu Boyt Wilder b. 1821 Greene Co., AL, d. 1905 Homer, LA, m. Caroline C. Lawrence. Both are buried in Old Homer Cem., Homer, LA. People in my family referred to him as "Uncle Gee" Wilder.
My great-grandmother was a first cousin of William Henry Wilder. She wrote her memoirs in the 1930s, giving short info about her aunts, uncles, and some cousins. She said that William Henry Wilder's first wife was Margaret Avery, but I've never found any record of that to prove it one way or the other. She said William Henry Wilder was pretty wild and she knew very little about him.