Nielsen Hayden genealogy
Descendants of Olivia de la Mare
Father: William de la Mare ( - Abt 1203)
Mother: Mabel de Malherbe
Olivia de la Mare
John de Thornhill (Bef 1203 of Thornhill, Dewsbury, Yorkshire, England - Bef 1250)
   ├─ Sarah de Thornhill
   │ Richard de Tankersley
   │    ├─ Alice le Tankersley ( - Aft 2 Jan 1329)
   │    │ Richard le Tyes (of Burghwallis, Doncaster, Yorkshire, England - Bef 2 Jan 1329)
   │    │    └─ Joan Le Tyes (of Burghwallis, Doncaster, Yorkshire, England - ??) =>
   │    │     + John Wentworth (of Elmsall, Yorkshire, England - ??)(m. 1314)
   │    └─ Joanna Tankersley ( - Aft 1329)
   │     Hugh de Eland ( - 1309)
   │        └─ John de Eland ( - 29 Oct 1350 Brighouse, Yorkshire, England) =>
   │         + Alice Lathom (m. Between 1308 and 1309)
   └─ Richard de Thornhill (of Thornhill, Dewsbury, Yorkshire, England - 1287)
    Maud de Fixby (of Fixby Hall, Huddersfield, Yorkshire, England - ??)
       └─ John de Thornhill (of Thornhill, Dewsbury, Yorkshire, England - Bef 9 Jul 1322)
        Beatrice Talboner ( - Aft 1334)
            + John de Dronsfield ( - Bef 25 May 1348)