The surname Cust in England can be found in records dating back as early as the 1200s. However, its speculated origin goes back even further to the time of the Norman Conquest in 1066, to a man by the name of Joceus/Goisfridus le Flemangh, called le Coste. Goals/Objectives: 1. To determine the relationship between the male lines of Cust in Ireland. 2. To prove the speculated relationship between the Yorkshire and Lincolnshire Cust families. 3. To determine/prove other lines of descent from Joceus le Flemangh. 4. To determine if there exists any genetic relationship in the male line between the surname Cust and etymologically similiar surnames: Cast, Cost, Coste, de Coste, Coust, et al (C*st).