Sebastian Goff was the brother of Margaret Travers. His niece Anne and nephew Alun spent a substantial amount of time with him and his family as children in the 1940s. (PROSE: One Cold Step)
He was married to Kathleen, and they had a son, Vernon. In the 1950s, they became grandparents to Vernon's son, Reece. (PROSE: Night of the Intelligence, AUDIO: Time of the Intelligence)