Family: William (De Vernon) Reviers, [Earl of Devon] / Mabel (Mabirie) De Beaumont, [COUNTESS OF DEV (F5243)
m. Abt 1189
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![Baldwin De Rivers, [Earl of Devon]](img/male.jpg){kind=small} | Baldwin De Rivers, [Earl of Devon] (1090-1155)
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 | Adeliza Lucia Debaalum (1099- ) |
| Richard De Reviers, [Earl of Devon] (1118-1162)  |
| Henry De Reviers (1123-1161) |
| Hawise De Reviers (1130- ) |
| Robert De Beaumont Count O, MEULLENT (1140-1207)
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| Peter Harcourt (1137- ) |
| Joan Harcourt (1139- ) |
| Waleran De Mellento (1162- ) |
| Henry De Mellento (1166- ) |
| Piers De Beaumont, [DEAN OF WIMBURN (1168-1203) |
| Agnes De Beaumont (1172- ) |
| Robert De Beaumont (1172- ) |
| William (De Vernon) Reviers, [Earl of Devon] (1128-1217)
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| Mabel (Mabirie) De Beaumont, [COUNTESS OF DEV (1168-1204)
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| Mary De Reviers (1196- ) |
| Baldwin De Rivers (1200-1216) |
| Joan De Rivers (1202- ) |