My cousin Douglas Adair has taken a DNA (yDNA) test on Ancestry.com. We are hoping to match his DNA with others who come from the Pennsylvania, Maryland, Delaware Adair's that arrived in the Colonies in the 1700's. Our ancestor Samuel Adair d 1773 in Marylandj. He was married to Hannah and left a will dated at that time. We descend from his son Joseph Adair who first married a Childs and then married our ancestor Eleanor Overfield. According to family stories, our Samuel was the 4th son of Thomas Adair of Pennsylvania and the first son to be born in the Colonies. When Thomas died, Samuel went to live with or near his Uncle William Adair who lived in New Castle, Delaware. This William had a son named Samuel who fought in the Revolutionary War -- our Samuel died in 1773. Our Samuel seems to have gone to the same Church with the William Adair family. We are trying to link up with Thomas or William or both genetically. Can anyone help. We are new to the DNA world.