Lady Margaret Butler (c. 1454 or 1465 – 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.
Her birth is listed as either 1454 or 1465. If 1465, she would have had daughter Anne at age 12, highly unlikely.
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 Hankeford 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 [1475? typo] 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.
Margaret's role in the rise and fall of the Boleyn clan is unknown, although there has been much speculation and theorizing.
She was the last of the Boleyns to live in Hever Castle as it was given to Anne of Cleves in 1540 sometime after her death. Margaret's lands were claimed by her only surviving grandchild, Mary Boleyn. and her husband William Stafford.
Margaret was a beneficiary of the will of her husband, Sir William Boleyn, the will made on 08 Oct 1505 and proved on 27 Nov 1505.
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