The wife of Joseph Buff was Fannie Cook. I have a copy of the will of Joseph Buff, but it does not give the names of his children, they are only refered to as "my children".
I have done bits of reasearch on the family of Joseph and Fannie cook Buff since this line links to my direct Buff line.
I'll try to look through my piles of William's and see if I come up with anything.
Vicki