I have Elizabeth Mitchell too who married John Washburn III, but do not have Abiels or Wickers. I have the Washburn line back pretty far but am not sure of the accuracy.
The earliest Washbourne is Roger De Washbourne of Washbourne South Worchester, Engalnd, born about 1219, married Joan Temp about 1225. Their son Johb Ed Washbourne born 1248 who married Isabelle Cassey about 1272..