Wayne,
Mary M. Morgan is my grandmother on my mother's side and to the best of my knowledge, the M stands for McEwen per my aunt who was married to John Henry Morgan, my grandmothers son. My grandmother was married to a Dewitt Morgan (born Jan. 1878). I am not sure of the marriage date. To the best of my knowledge, from my mother (deceased), her mother was married to Archibald McEwen. I know that is not much to go on. I will try to get her (grandmother) birth certificate from Mississippi if I can.Thanks, Jim Tyrney