Nielsen Hayden genealogy
Descendants of Alan de Percy
- Bef 1135Father: William I "Whiskers" de Percy ( - 1096 Jerusalem)
Mother: Emma de Port
Alan de Percy (of Topcliffe, Yorkshire, England - Bef Dec 1135 bur.Whitby, Yorkshire, England)
Emma de Gant ( - Aft 1140)
   └─ William de Percy (of Topcliffe, Yorkshire, England -
    Between 1174 and 1175 bur.Fountain Abbey, Yorkshire, England)
    Between 1174 and 1175 bur.Fountain Abbey, Yorkshire, England)
    Adelis de Tunbridge ( - Aft 1138)(m. Bef 1136)
    :   └─ Agnes de Percy ( - Bef 13 Oct 1204 bur.Whitby, Yorkshire, England)
    :    Joscelin of Louvain (of Petworth, Sussex, England - 1180)(m. Between 1154 and 1161)
    :       ├─ Henry de Percy (of Petworth, Sussex, England - Bef 29 Sep 1198) =>
    :       │ + Isabel de Brus (of Skelton, Yorkshire, England - Aft 1230)
    :        + John d'Eiville (of Egmanton, Nottinghamshire, England - Aft Jun 1228)
    + Sybil de Valognes ( - Aft 1212 bur.Nun Appleton Priory, Yorkshire, England)(m. Between 1164 and 1166)