Katie, I have a "Lena (last name unknown)" who was born in Tennessee about 1895 who was married to a Luther Dillehay. They had at least two children; Mamie, b. ca. 1911, and Austin, b. ca. 1928. Does this sound like it may be some of your family?
Please give me maiden names for the women in your family. Was your mother a Dillehay or was that her married name?