I am looking for any information on my great grandparents (and further if possible). Their names were Alvirdia Priest Rankins b. 6/13/1879, d. 8/16/1919, and Robert Clifton Rankins b. 8/17/1877, d. 8/20/1961. They are both buried in Altoga Cemetary, Collin County, TX. I've recently learned through DNA test that I am part Native American and am seeking to learn which of them may have been as well.