Nielsen Hayden genealogy
Descendants of (Unknown) de Burgh
Father: Richard de Burgh (Abt 1193 - 1242)
Mother: Gille de Lacy (of Dublin, Ireland - 1242)
(Unknown) de Burgh
Gerald de Prendergast (of Enniscorthy in Templeshanbo, Wexford, Ireland - Aug 1251)
   └─ Maud de Prendergast (Abt 1242 - Bef 1276)
    Maurice fitz Maurice (Abt 1238 - Bef 2 Sep 1277)(m. Bef 28 Oct 1259)
       └─ Juliane fitz Maurice (of Offaly, Ireland - Bef 24 Sep 1300)
        Thomas de Clare (Between 1243 and 1248 - 29 Aug 1287 Ireland)(m. Bef 18 Feb 1275)
           │ + Robert de Clifford (Abt 1 Apr 1274 - 24 Jun 1314 Bannockburn, Stirlingshire, Scotland)
           │ (m. 13 Nov 1295)
           │ (m. 13 Nov 1295)
           └─ Margaret de Clare (Between 1286 and 1287 - 1333) =>
            + Gilbert de Umfreville ( - Bef 23 May 1303 bur.Hexham Priory, Northumberland, England)(m. 1289)
            + Bartholomew de Badlesmere (Abt 1275 of Badlesmere, Kent, England -
            12 Apr 1322 Canterbury, Kent, England)(m. Bef 29 Sep 1305)
            12 Apr 1322 Canterbury, Kent, England)(m. Bef 29 Sep 1305)