Margaret de Quincy, Countess of Lincoln

Margaret de Quincy, 2nd Countess of Lincoln suo jure was a wealthy English noblewoman and heiress having inherited in her own right the Earldom of Lincoln and honours of Bolingbroke from her mother Hawise of Chester, received a dower from the estates of her first husband, and acquired a dower third from the extensive earldom of Pembroke following the death of her second husband, Walter Marshal, 5th Earl of Pembroke. Her first husband was John de Lacy, 2nd Earl of Lincoln, by whom she had two children. He was created 2nd Earl of Lincoln by right of his marriage to Margaret. Margaret has been described as one of the two towering female figures of the mid13th century.

Margaret was born in about 1206, the daughter and only child of Robert de Quincy and Hawise of Chester, herself the coheiress of her uncle Ranulf de Blondeville, 6th Earl of Chester. Hawise became suo jure Countess of Chester in April 1231 when her brother resigned the title in her favour.

Source: Wikipedia