The correct answer to the Whose Relatives -III posting is NDP head honcho Jack Layton. Ancestors on his father's side had last names Biggers, Carter, Craddock, England, Farmer, Gibson, Gilbert, Grimmett.
John Gilbert "Jack" Layton is the son of former PC cabinet minister Robert Layton(1925 - 2002) and Doris Steeves. Through his mother's line he's related to, although not descended from, a Father of Confederation.
His great grandfather was Philip Edward David Layton, a blind activist immigrant to Montreal from England, son of Philip Layton a London-based "artist in wood," born in Northamptonshire.