Robert de Clavering, 1st Baron Clavering was born circa 1247 to Roger FitzJohn, 4th Lord of Warkworth & Clavering (c1201-c1249) and Isabella de Dunbar (c1199-aft1269) and died 1310 of unspecified causes. He married Margaret La Zouche (c1248-?) .
Children
| Name | Birth | Death | Joined with |
| Euphemia de Clavering (c1266-c1320) | 1266 | 1320 | Randolf Neville, 1st Baron Neville de Raby (1262-1331) |
| John de Clavering, 2nd Baron Clavering (c1268-1332) | |||
| Alan de Clavering (c1270-?) | |||
Footnotes (including sources)