Hi Don: I'll bet you're right.I went to Arkansas and Oklahoma two years ago and did a good deal of research on the Dees Family.Through a combination or resources I have Robert A. who married Liza Jane Gainer in 1909, Wilburton, Latimer, OK.They had the following children:Anne M. (married Ben Carter), Belle, Mahaley (married Lewis Priest), Otis. and Ellen (Helen) (married Harry Bays).I don't show your mom.Would these people be your mom's sisters and brother?
The records also show him as Robert E. Dees when he married a Dora Belle Gentry. in 1900.They may have had two children:Raymond and Pearl.
New Hope Cemetery records in Spiro, OK show his dates to be: Sept 1, 1879 to July 12, 1958 Liza Jane's dates are: Oct. 14, 1884 to August 11, 1970.
Before I drag on and on - does any of this sound familiar???
Let me know if you can read a Ged Com file through your genealogy software.If so, I will send what I have.