Reginald de Dunstanville, 1st Earl of Cornwall, was born circa 1110 to Henry I of England (1068-1135) and Sybilla Corbet (1077-) and died 1 July 1175 of unspecified causes. He married Beatrice de Vaux 1222 JL .
Siblings
| Name | Birth | Death | Joined with |
| Robert, 1st Earl of Gloucester (1090-1147) | 1090 England, United Kingdom | 1147 Bristol, Gloucestershire, England, United Kingdom | Isabel de Douvres (c1090-) Mabel of Gloucester (c1095-1156) |
| Maud FitzRoy (c1091-) | 1091 England | Conan III de Bretagne (1095-1148) | |
| Constance FitzRoy (c1092-) | 1110 | Roscelin de Beaumont-au-Maine (-1176) | |
| Mabel FitzRoy (c1093-) | 1093 | Guillaume Gouët (bef1080-) | |
| Alice FitzRoy (c1116-bef1141) | 1116 | 1141 | Mathieu I de Montmorency (1100-1160) |
| Gilbert FitzRoy (c1095-) | |||
| Emma FitzRoy (c1110-c1157) | 1110 | 1157 | Guy III de Laval (-c1140) |
| Name | Birth | Death | Joined with |
| Juliane de Fontevrault (1090-) | |||
| Fulk FitzRoy (1092-) | |||
| Richard of Lincoln (1094-1120) | 1094 | 25 November 1120 English Channel | |
| Name | Birth | Death | Joined with |
| Matilda of Normandy (1102-1167) | 1102 Winchester, Hampshire, England, United Kingdom | 10 September 1167 Rouen, France | Heinrich V of the Holy Roman Empire (1086-1125) Geoffrey V, Count of Anjou and Maine (1113-1151) |
| William of Normandy (1103-1120) | 5 August 1103 Winchester, Hampshire, England, United Kingdom | 25 November 1120 English Channel | Matilda of Anjou (1111-1154) |
| Richard of Normandy (c1125-) | |||
| Name | Birth | Death | Joined with |
| Sybilla de Normandy (c1106-) | |||
| William Constable (c1108-) | |||
| Reginald de Dunstanville, 1st Earl of Cornwall (c1110-1175) | 1110 | 1 July 1175 | Mabel FitzRichard (c1100-c1147) Beatrice de Vaux |
| Gundred of England (1114–1146) | |||
| Rohese of England (1114-) | |||
| Elizabeth of England (c1115-) | |||
| Name | Birth | Death | Joined with |
| Robert FitzEdith (c1111-) | |||
| Matilda FitzRoy (c1090-1120) | 1090 | 25 November 1120 English Channel | Rotrou III du Perche (c1075-1144) |
| Adeliza FitzEdith (c1113-) | |||
| Henry FitzHenry (c1114-) | |||
| Isabel Hedwig of England (c1115-) | |||
| Matilda FitzRoy (c1116-) | |||
| Name | Birth | Death | Joined with |
| William de Tracy (-c1189) | |||
| Name | Birth | Death | Joined with |
| Henry FitzRoy (1103-1158) | |||
Children
| Name | Birth | Death | Joined with |
| Nicholas de Dustanville (1136-1175) | |||
| Hawyse de Dustanville (1138-1162) | |||
| Ursula de Dustanville (c1145-) | |||
| Sarah de Dustanville (c1130-1216) | 1130 | 1216 | Adhémar V Boson de Limoges (1135-1187) |
| Maud FitzRoy (c1143-) | 1143 | Robert de Beaumont, Count of Meulan (c1142-1204) | |
| Joan FitzRoy (c1150-) | |||
| Reginald de Dustanville (c1152-) | |||
| Name | Birth | Death | Joined with |
| William FitzCount | |||
| Name | Birth | Death | Joined with |
| Emma de Dunstanville (c1143-c1190) | 1143 | 1190 | Guy IV de Laval (c1135-c1182) |
Footnotes (including sources)
| ‡ General |