He married Nancy Cooper and the had three daughters, at least. De Mille was born in 1881. Carrie and Bertha I do not have any info on.
De Mille was my grandfathers first wife. They had a daughter named Elma about 1908, perhaps another child who died in infancy earlier. De Mille died in 1908 and is buried in the Crooksville Cemetery in Perry County. If this sounds like a connection to anyone, I took a photo of both De Mille's headstone and her parents, since she is buried next to them. I can scan and share, if this is a connection.