Hi Bicker
My great-grandfather came from Derrymullen. Local residents referred to it as a "village", which it kind of was, just outside of Ballinasloe. Most of the local families lived there for generations and were engaged in farming, although some new houses were erected after 1900 that was occupied by railway employees and labourers. I'm from Ballinasloe, so I might be able to help you with your research. DNA would certainly help you in identifying your husband's great grandfather.