George Martin, son of Joseph Martin and Susannah Chiles, died in 1774 in Albemarle County, Va. wife believed to be Molly Durrett. Abstract of his will says “13 July, 1774. March Court 1777. Of Fredericksville Parish, Albemarle County. Daughters Sally Flynt and Susannah Martin. Exrs: Isaac Davis, William Martin, Thimas Burris, William Sims. “
So yes, he had a daughter Susannah, but she was unmarried in 1777. His wife apparently died before 1777 since she is not mentioned. Sally may have been a step-daughter since William Flint’s wife is listed as Sally Durrett by the DAR.