 On 23 November 1232, Margaret and her husband John de Lacy, Baron of Pontefract were formally invested by King Henry III as Countess and Earl of Lincoln.In April 1231 her maternal uncle Ranulf de Blondeville, 1st Earl of Lincoln had made an "inter vivos" gift, after receiving dispensation from the crown, of the Earldom of Lincoln to her mother Hawise.Her uncle granted her mother the title by a formal charter under his seal which was confirmed by King Henry III.