Feb. 5, 1793 Mount Vernon Fairfax County Virginia, USA
Major US Army George Augustine Washington was the Son of Colonel Charles Washington by his wife & 1st cousin once removed Mildred Thornton daughter of Colonel Francis Thornton of Fall Hill, Spotsylvania County, Virginia, by his wife Frances, daughter and co-heiress of Roger Gregory, by his wife Mildred Washington, and first husband of Frances Bassett Washington Lear. and nephew of President George Washington.
He was born ca. 1758/59 probably Stafford County, VA. I had placed his birth early as 4 June, 1763 which was suggested to me a while back, but that birth date would be the same as his Sister's birth Frances Washington that married Col. Burgess Ball, and no were in Burke's Presidential Families of the United States does it mention that they were twins.