I spoke too soon...

Two more twins, in one family no less! Louis and Louise, age 12, also in Wagoner Co, Oklahoma, listed as the grandchildren of Ed and Geneva McDonald. Also Ruth and Rubin age 3 listed as the great-grandchildren of the same couple. The children's last name is Deloren or Delosen, I think. (ED 42-17, Sheet 4-B, lines 46-49)