Christian Heron was probably a daughter of Patrick Heron, MP and Margaret McKie. Probably a paternal aunt of Patrick Heron (1736-1803). Married to John Stewart, son of Patrick Coltrane (1680-1717) and Elizabeth Stewart. John Stewart was killed at the battle of Prestonpans in 1745. Mother of Margaret Stewart.
Boswell met Christian Heron at Dumfries on October 5, 1762, describing her as "a very genteel well-bred woman who possesses the medium between forwardness and reserve that is seldom attained".