Nielsen Hayden genealogy
Descendants of Richard de Avenal
Richard de Avenal
   └─ (Unknown) de Avenal
    William I "The Lion", King of Scotland (1143 - 4 Dec 1214 Stirling, Stirlingshire, Scotland)
       └─ Isabel of Scotland
        Robert de Ros (Between 1170 and 1172 Helmsley, Yorkshire, England -
        Bef 23 Dec 1226 bur.Temple Church, London, England)(m. 1191 Haddington, East Lothian, Scotland)
        Bef 23 Dec 1226 bur.Temple Church, London, England)(m. 1191 Haddington, East Lothian, Scotland)
           ├─ Robert de Ros (of Wark, Northumberland, England - Bef Nov 1269) =>
           │ +
           └─ William I de Ros (Aft 1192 of Helmsley, Yorkshire, England -
            1264 bur.Kirkham Priory, Yorkshire, England) =>
            1264 bur.Kirkham Priory, Yorkshire, England) =>
            + Lucy fitz Peter (of Blaen Llyfni, Cathedine, Brecconshire, Wales - Aft 29 Sep 1266)
            (m. Bef 24 Jan 1234)
            (m. Bef 24 Jan 1234)