I wondered about both of those Johnson's as well, but their relationship really should have been recorded to Thomas if they were related to his wife. Johnson and Johanson are such common names. Where do you think your grandmother, Mamie, was in 1910? I haven't been able to find a 16 year old in 1910 with that name that looks like it could be her as a young married. Was she married by then? Joan in Illinois