Margaret de Quincy, 2nd Countess of Lincoln, was born circa 1206 to Robert de Quincy (-1217) and Hawise of Chester (1180-1242) and died March 1266 of unspecified causes. She married John de Lacy (c1192-1240) . She married Walter Marshal, 5th Earl of Pembroke (1196-1245) 6 January 1242 JL .
Children
| Name | Birth | Death | Joined with |
| Maud de Lacy, Countess of Lincoln (1223-c1287) | 25 January 1223 | 1287 | Richard de Clare, 6th Earl of Hertford (1222-1262) |
| Edmund de Lacy, 2nd Earl of Lincoln (c1227-1258) | |||
Footnotes (including sources)
| ‡ General |