Nielsen Hayden genealogy
Descendants of (Unknown) de Birkin
Father: Adam de Birkin (of Laxton, Nottinghamshire, England - 1185)
Mother: Maud de Cauz ( - Bef 25 May 1224)
(Unknown) de Birkin
Robert le Vavasour (of Addingham, Yorkshire, England - Bef 1228)
   └─ Maud le Vavasour ( - Bef 1226)
    Theobald Walter ( - Bef 14 Feb 1205 bur.Owney Abbey, Limerick, Ireland)(m. Bef 1201)
    :   ├─ Maud Walter
    :   │ + Gerald de Prendergast (of Enniscorthy in Templeshanbo, Wexford, Ireland - Aug 1251)
    :   └─ Theobald le Boteler (1200 of Arklow, Wicklow, Ireland -
    :    Abt 1230 bur.Abbey of Arklow, Wicklow, Ireland)
    :    Abt 1230 bur.Abbey of Arklow, Wicklow, Ireland)
    :    Rohese de Verdun ( - Bef Feb 1247)(m. Aft 4 Sep 1225)
    :       │ + John Fitz Alan (Abt 1223 of Clun, Shropshire, England - Bef 10 Nov 1267)(m. Bef 1240)
    :       └─ John de Verdun (Abt 1226 of Alton, Staffordshire, England - Bef 17 Oct 1274) =>
    :        + Margaret de Lacy ( - 1256)(m. Bef 20 Apr 1242)
    :        + Eleanor de Bohun ( - Aft 10 Jun 1278)(m. Bef 1267)
    Fulk III Fitzwarine (of Whittington, Oswestry, Shropshire, England - Bef 22 Nov 1235)(m. Bef 1 Oct 1207)
       ├─ Hawise Fitzwarine (of Narborough, Blaby, Leicestershire, England - Aft Jan 1233)
       │ William Pantolf (of Wem, Shropshire, England - Jan 1233)(m. Bef Jan 1226)
       │    └─ Maud Pantolf (of Wem, Shropshire, England - Bef 6 May 1289) =>
       │     + Ralph le Boteler (of Oversley, Alcester, Warwickshire, England - Bef 10 Jan 1278)(m. Bef 1245)
       ├─ Eve Fitzwarine ( - Aft 1281)
       │ William Blancminster (of Whitchurch, Shropshire, England - Bef 1260)
       │ :   └─ Eleanor Blancminster (of Whitchurch, Shropshire, England - Aft 1276) =>
       │ :    + Robert le Strange (of Blackmere, Whitchurch, Shropshire, England - Abt Aug 1276)(m. Abt 1250)
       │ + Llywelyn Fawr ap Iorwerth (Abt 1173 - 11 Apr 1240 Aberconwy Abbey, Conwy, Wales)(m. 1239)
       └─ Fulk IV Fitzwarine (Abt 1208 of Whittington, Oswestry, Shropshire, England -
        14 May 1264 River Ouse, Sussex, England)
        14 May 1264 River Ouse, Sussex, England)
        Clarice de Auberville (of Iden, Sussex, England - Aft 8 Oct 1250)
        :    + John de Tregoz (Abt 1250 of Ewyas Harold, Herefordshire, England - Bef 6 Sep 1300)
        Constance de Toeni (Between Jul 1233 and Jan 1237 - 11 Feb 1266)(m. Aft 1238)
           └─ Fulk V Fitzwarine (14 Sep 1251 Whittington, Oswestry, Shropshire, England - 24 Nov 1315) =>
            + Margaret de la Pole ( - 11 May 1336)(m. Bef 25 Feb 1277)