Margaret de Quincy, Countess of Lincoln
…mother to the de Lacy family. John's first marriage to Alice de l'Aigle had not produced issue; although John and Margaret together had two children: Maud de Lacy (25 January 1223- 1287/10 March 1289), married in 1238 Richard de Clare, 6th Earl of Hertford, 2nd Earl of Gloucester, by whom she had seven children…