I had some children of William Adair and Susan Davis Rooker as:
1.John Adair b. 1824-1842 d. 1824-1921 2.Elizabeth Adair b. 1826 d. 1857-1920 3.Saphronia Caroline Adair 4.Benjamin Joseph Adair b. 1837 in HenryCounty, GA d. February 28, 1865 in Richmond, VA (Civil War).
I will add your William Dorsey Adair.Would like any other data you care to share on his family, descendants or ancestors.
Benjamin is my gg grandfather which would make William and Susan my ggg grandparents, the same as yours. If I read the chart correctly, that would make us Fourth Cousins.