Nielsen Hayden genealogy
Descendants of Baderon de Monmouth
Abt 1100 - 1176 (~ 70 years)Father: 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)
       ├─ (Unknown) de Lacy
       │ William Fitz Alan (Abt 1154 of Oswestry, Shropshire, England - 1210)(m. Abt 1175)
       │    └─ John Fitz Alan (of Clun, Shropshire, England - Bef 15 Mar 1240) =>
       │     + Isabel d'Aubigny ( - Bef 1240)(m. Bef 1223)
       ├─ Walter de Lacy (Abt 1172 - Bef 24 Feb 1240)
       │ Margaret de Briouze (Abt 1181 - Aft 25 Jun 1245)(m. Bef 19 Nov 1200)
       │    │ + Ralph VI de Tony (Abt 1189 of Flamstead, Hertfordshire, England - Abt 29 Sep 1239 At sea)
       │    │ (m. Between 1232 and 1233)
       │    │ (m. Between 1232 and 1233)
       │    │ + Richard de Burgh (Abt 1193 - 1242)(m. Bef 21 Apr 1225)
       │    └─ Gilbert de Lacy (of Ewyas Lacy, Herefordshire, England - Between 12 Aug 1230 and 15 Dec 1230) =>
       │     + Isabel le Bigod
       └─ Hugh de Lacy (Abt 1176 -
        Bef 26 Dec 1242 bur.Convent of the Franciscan Friars, Carrickfergus, Antrim, Ireland)
        Bef 26 Dec 1242 bur.Convent of the Franciscan Friars, Carrickfergus, Antrim, Ireland)
        + Emeline de Ridelisford (of Bray, Berkshire, England - Between 18 May 1275 and 19 Jul 1276)
        + Lesceline de Verdun (m. Abt 1195)