Gordon Lethbridge-Stewart

Gordon James Lethbridge-Stewart was the son of Kate Lethbridge-Stewart (a.k.a Kate Stewart) and the grandson of Fiona and Alistair Gordon Lethbridge-Stewart. Doris Lethbridge-Stewart was his step-grandmother. (HOMEVID: Downtime; TV: Battlefield)

Gordon was reared by Kate as a single parent, initially aboard a narrow houseboat moored on an English river. His unnamed father chose not to be a part of his and his mother's lives. Gordon was a few years old before he met his grandfather, Alistair, Kate having kept her pregnancy and Gordon's existence a secret from her father. (HOMEVID: Downtime)

Like Anthony Brian Williams whose middle name is his grandfather's first name, Gordon's first name is his grandfather's middle name. (HOMEVID: Downtime; Webcast: P.S.)