Lady Margaret Butler

Lady Margaret Butler (c. 1454 – 1539) was an Irish noblewoman, the daughter and co-heiress of Thomas Butler, 7th Earl of Ormond. She married Sir William Boleyn and through her eldest son Sir Thomas Boleyn, was the paternal grandmother of Anne Boleyn, second wife of King Henry VIII of England, and great-grandmother of Anne and Henry's daughter, Elizabeth I of England.

She was born at Kilkenny Castle in County Kilkenny, Ireland, the daughter and co-heiress of Thomas Butler, 7th Earl of Ormond and Anne Hankford. Her paternal grandparents were James Butler, 4th Earl of Ormond and Joan de Beauchamp. Her maternal grandparents were Sir Richard Hankford (c. 1397 – 1431) and Anne de Montagu.

She had one younger sister, Anne who married Sir James de St. Leger, by whom she had issue. Anne and Margaret claimed to be co-heiresses of their father and the Earldom of Ormond, but their cousin, Piers Butler, who had physical control of the Irish estates and the backing of the Irish Council, claimed to be the heir through the direct male line. In 1520, the King granted her a pardon for the alienation of Fritwell Manor, Oxfordshire. The issue wasn't resolved until 1528, by which time Margaret's position was good, with the influence of her granddaughter, then betrothed to Henry VIII, and Margaret's son, Thomas Boleyn's, status as King's adviser.

In 1465 Margaret married Sir William Boleyn, and in total they had ten children. Her son, the ambitious courtier Sir Thomas Boleyn, became the first Earl of Wiltshire and by his marriage to Elizabeth Howard, the Duke of Norfolk's daughter, was the father of Anne Boleyn, Queen consort of England. Thus, Margaret was great-grandmother to Queen Elizabeth I of England.