Robert V le Roux de Béthune, Lord of Béthune, Lord of Richebourg, Lord of Varneston, Lord of Chocques, was born circa 1130 in Béthune to Guillaume I de Béthune (1095-1144) and Clémence d'Oisy (1110-1164) and died 1191 of unspecified causes. He married Adélaide de Saint-Pol (1130-c1177) 1150 JL .
Children
| Name | Birth | Death | Joined with |
| Baudouin de Béthune (-1211) | |||
| William de Bethune (-1213) | |||
| Robert VI de Béthune | |||
| Mathilde de Béthune | |||
| Guillaume II de Béthune (c1160-1213) | 1160 Béthune | 1213 | Mahaut de Termonde (c1183-1224) |
| Clémence de Béthune | |||
| Jean de Béthune (-1219) | |||
| Conon I de Béthune (-1218) | |||
| Barthélémy de Béthune | |||
Footnotes (including sources)
| ‡ General |