What is XXX's brothers name?
George Mason VI
George Mason VI was a grandson of George Mason (1725--1792); son of George Mason V (1753--1796); brother of Richard Barnes Mason (1797--1850); grandnephew of Thomson Mason (1733--1785); first cousin once removed of Stevens Thomson Mason (1760--1803), John Thomson Mason (1765--1824), and William Temple Thomson Mason (1782--1862); first cousin of Thomson Francis Mason (1785--1838) and James Murray Mason (1798--1871); second cousin of Armistead Thomson Mason (1787--1819), John Thomson Mason (1787--1850), and John Thomson Mason, Jr. (1815--1873); and second cousin once removed of Stevens T. Mason (1811--1843).
Richard Barnes Mason