Nielsen Hayden genealogy
Ancestors of Sybil Montagu
┌── Simon de Montagu (Aft 1250 - 26 Sep 1316 bur.Bruton Priory, Somerset, England)
│ (m. Aft 24 Oct 1270) =>
┌── William de Montagu (Abt 1285 of Shepton Montague, Somerset, England - 18 Oct 1319 Gascony, France)
│ (m. Aft 20 Jun 1292)
│ └── Hawise de St. Amand ( - 1287)(m. Aft 24 Oct 1270) =>
│
┌── William de Montagu (Between 1302 and 1303 of Shepton Montague, Somerset, England - 30 Jan 1344)
│ (m. Bef 1328)
│ │
│ │ ┌── Peter de Montfort (Abt 1240 of Beaudesert, Warwickshire, England - Bef 4 Mar 1286)
│ │ │ (m. Abt 1260) =>
│ └── Elizabeth de Montfort (of Beaudesert, Warwickshire, England - 16 Aug 1354 bur.Priory of St.
│ Frideswide (now Christ Church), Oxford, Oxfordshire, England)(m. Aft 20 Jun 1292)
│ Frideswide (now Christ Church), Oxford, Oxfordshire, England)(m. Aft 20 Jun 1292)
│ └── Maud de la Mare (Abt 1242 - ??)(m. Abt 1260) =>
│
│
│ ┌── Pierre de Grandison (Abt 1186 - 1258)(m. Abt 1225) =>
│ ┌── William de Grandison (Between 1250 and 1251 - 27 Jun 1335 bur.Dore Abbey, Herefordshire, England)
│ │ (m. Bef 1286)
│ │ └── Agnès de Neufchâtel (Between 1207 and 1209 - Aft 15 Apr 1283 bur.Priory Church of Saint-
│ │ Jean Baptiste, Grandson, Jura-Nord Vaudois, Vaud, Switzerland)(m. Abt 1225) =>
│ │ Jean Baptiste, Grandson, Jura-Nord Vaudois, Vaud, Switzerland)(m. Abt 1225) =>
│ │
└── Katherine de Grandison ( - 23 Apr 1349)(m. Bef 1328)
│
│ ┌── John de Tregoz (Abt 1250 of Ewyas Harold, Herefordshire, England - Bef 6 Sep 1300) =>
└── Sibyl de Tregoz (Abt 1272 - 21 Oct 1334 Dore, Herefordshire, England)(m. Bef 1286)
└── Mabel Fitzwarine ( - Bef 24 May 1297) =>