Biography
Robert de Quincy was born on an unknown date to Saer de Quincy, 1st Earl of Winchester (c1170-1219) and Margaret Beaumont (1180-1236) and died 1217 of accidental poisoning through medicine prepared by a Cistercian monk. He married Hawise of Chester (1180-1242) 1208 JL .
Children
| Name | Birth | Death | Joined with |
| Margaret de Quincy (1206-1266) | 1206 | March 1266 | John de Lacy, 1st Earl of Lincoln (c1192-1240) Walter Marshal, 5th Earl of Pembroke (1196-1245) |
Footnotes (including sources)
| ‡ General |