Thomson Francis Mason was an American lawyer, planter and politician who served as the mayor of Alexandria between 1827 and 1830, and as a justice of the peace for many years and briefly in the months before his death as a judge of the Washington, D.C., criminal court.

George Mason V was an American planter, businessman, and militia officer. Mason was the eldest son of United States patriot, statesman, and delegate from Virginia to the U.S. Constitutional Convention, George Mason IV and his wife Ann Eilbeck. He received his early education from private tutors at Gunston Hall and was given Lexington plantation on Mason's Neck by his father in 1774. In 1775, he named his plantation to commemorate the Battle of Lexington in Massachusetts.