Mary Lethbridge and married William Stewart in 1603, becoming Mary Lethbridge-Stewart and beginning the Lethbridge-Stewart family.(PROSE: The Daughters of Earth)
Her father was Sir John Lethbridge and her brother was Peter Lethbridge. Peter's descendants begat the John Lethbridge who became the first Lethbridge Baronet. Her son was Henry John Lethbridge-Stewart and she died in childbirth. (PROSE: The Soothsayer)