My personal Genealogy Research Graham and Rose

I have been in contact with another Washington County, PA researcher who thinks that there is a possibility that her Aneas Graham was related to my DeWitt Clinton Graham. I am also looking for Joseph Rose (also of Washington County, PA - Monongahela twp:) who might have been the father of DeWitt's mother Elizabeth Rose. DeWitt Clinton Graham was a Civil War vet. he later moved to Ohio.