The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
 MaleWilliam Marshall, m. Isabel de Clare |
| Birth | Abt 1146 | |
| Death | 14 May 1219 | |
| Burial | ||
| Marriage | ||
| Father | John Marshall, m. Sybilla Salisbury | F6027 Group Sheet | |
| Mother | ||
 FemaleIsabel de Clare, m. William Marshall |
| Birth | abt. 1172 | |
| Death | 7 Mar 1220 | |
| Burial | ||
| Father | Richard fitzGilbert de Clare, m. Aoife MacMurrough | F6024 Group Sheet | |
| Mother | Aoife MacMurrough, m. Richard de Clare | F6024 Group Sheet | |
| Female + Eva Marshall, m. William Braose |
| Birth | 1194 | |
| Death | Bef 1246 | |
| Burial | ||
| Spouse | William de Braose, m. Eva Marshall | F6026 | |
| Marriage | ||
| Female + Isabel Marshall, de Clare, Countess of Cornwall |
| Birth | 9 Oct 1200 | Pembroke Castle, PEmbrokeshire, Wales, UK  |
| Death | 15 Jan 1240 | Berkhampstead, Berkhamsted, Hertfordshire, England, UK |
| Burial | ||
| Spouse | Gilbert de Clare, Earl of Hertford & Gloucester; Surety of the Magna Carta | F906 | |
| Marriage | ||
| Female + Maud Marshall, m. William Warenne |
| Birth | ||
| Death | ||
| Burial | ||
| Spouse | William Warenne, m. Maud Marshall | F995837 | |
| Marriage | ||
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