Hi moorlands, I see that you edited your post to reflect that the people are deceased. If you can give us as much information as possible about them - approximate dates and places of birth and death, occupations, other relatives, etc. - that may help us to find out more about them.
As you may already know, the US Census is currently only available up to 1930 and the 1940 Census will be out next April, so we'll have to see if other information can be found.