If my father signed a quick claim deed and has now passed away who does that property go to

I was told my grandfather had a will stating that his property went to the oldest living person carrying his last name. When he passed my uncle took possession of the property. After he died it was acquired by someone in the bloodline but with a different name. I believe after my uncle died my aunt (who never had my grandfathers last name because she wasn't biologically his daughter) found my father who was living on the streets at that time by placing an ad in the newspaper and had him sign a quick claim deed not knowing what is was. His words were to me that he "loaned her" 10 acres. Now that my father has passed is that land rightfully mine or is the holder of the deed the permanent owner?