John F. married and had 8 children. - (Info provided by Cheryl Simpson) On the 1861 Census for Alderney it has George Ferguson head, Maria Ferguson wife, John Ferguson Son, John Aveson Stepson, Henry Aveson Stepson and Christopher Aveson Stepson.
John's son, George, became Lord Mayor of Cardiff at the time when Cardiff Castle was given to the city, by the Bute family, around 1947. (Info provided by Muriel Williams).