Esther - A little information that may help ... Comfort Costen seems to be daughter of Benton Costen and Elizabeth Dickerson. Benton seems to be a son of Stephen Costen and Mary Fogg, and Stephen seems to be son of Stephen Costen and Comfort Furniss.
There seems to be a lot of overlap between Coston, Costin and Costen around this time and place. SteveC