Original: Mary Boleyn ( c. 1499\/1500 -- 19 July 1543 ) was the sister of English queen consort Anne Boleyn and a member of the Boleyn family , which enjoyed considerable influence during the reign of King Henry VIII of England .
Simplified: Mary Boleyn ( about 1499 - 19 July 1543 ) was the elder sister of Anne Boleyn , the second wife of King Henry VIII . They had a brother called George Boleyn .