Nielsen Hayden genealogy
Descendants of Jordan fitz Essulf
- Aft 1194Father: Essulf (of Birkin, Yorkshire, England - Bef 1159)
Jordan fitz Essulf (of Thornhill, Dewsbury, Yorkshire, England - Aft 25 Jan 1194)
   └─ Richard de Thornhill ( - Bef 1209)
    Alice ( - Aft 1209)
       └─ John de Thornhill (Bef 1203 of Thornhill, Dewsbury, Yorkshire, England - Bef 1250)
        Olivia de la Mare
           │ + Richard de Tankersley
           └─ Richard de Thornhill (of Thornhill, Dewsbury, Yorkshire, England - 1287) =>
            + Maud de Fixby (of Fixby Hall, Huddersfield, Yorkshire, England - ??)