His mother's first cousin was Dabney Carr, a member of the Virginia House of Burgesses and his wife, Martha Jefferson. Martha was the sister of President Thomas Jefferson and she was also a cousin of William's second wife, Anne Price. Martha's mother was Jane Randolph, daughter of Isham Randolph, a ship's captain and sometime planter, first cousin to Peyton Randolph, and granddaughter of wealthy English gentry. Martha's father was Peter Jefferson, a planter and surveyor in Albemarle County (Shadwell, then Edge Hill, Virginia.) He was of Welsh descent. When Colonel William Randolph, an old friend of Peter Jefferson, died in 1745, Peter assumed executorship and personal charge of William Randolph's estate in Tuckahoe as well as his infant son, Thomas Mann Randolph, Jr. That year the Jeffersons relocated to Tuckahoe where they would remain for the next seven years before returning to their home in Albemarle. Peter Jefferson was then appointed to the Colonelcy of the county, an important position at the time.