Nielsen Hayden genealogy
Descendants of Baderon de Monmouth
Baderon de Monmouth
(of La Boussac, Brittany, France - ??)
   └─ William de Monmouth (Between 1060 and 1065 of Monmouth, Monmouthshire, Wales - Bef 1138)
   
       └─ Baderon de Monmouth (Abt 1100 Monmouth, Monmouthshire, Wales - Between 1170 and 1176)
        Rohese fitz Gilbert ( - Bef 1166)
           └─ Rohese de Monmouth (Between 1135 and 1140 - Abt 1180) =>
            + Hugh de Lacy (of Meath, Ireland - 25 Jul 1185)(m. Bef 1155)