Augustine Washington Jr. is the half-brother of George Washington, the first president of the United States. Augustine Jr. is the son of Augustine Washington Sr. and Augustine Sr's first wife Jane Butler. Augustine Jr is also the brother of Lawrence Washington, the builder of the Mt. Vernon estate. Augustine Sr. was married, for the second time, to Mary Ball. It was from this second marriage of Augustine Sr in which George Washington, the President, was born. Augustine Washington Jr. married Ann Aylett. They are both buried is the same common grave.