Earl of Salisbury children: to his son Edward in 1485 until his execution for treason in 1499, and to Edward's sister, Margaret Pole, Countess of Salisbury, in 1513 until she was also executed, and the title again forfeited, in 1539. In 1605 the title was given to Robert Cecil, 1st Earl of Salisbury, a close advisor to James I. Cecil was a son of Queen Elizabeth I's chief advisor, William Cecil, 1st Baron Burghley. For information on this creation, see the Marquess of Salisbury. Some sources call Edward Plantagenet, 17th Earl of Warwick (1475–1499) also Earl of Salisbury, but "there is no reason
Earl of Leicester The properties associated with the earldom became part of what was later called the Duchy of Lancaster. In 1564 the earldom was again created for Queen Elizabeth I's favourite, Robert Dudley. Since Dudley died without heirs, the title became extinct at his death. The title was again created in 1618 for Robert Sidney, his nephew. Along with the earldom Robert Sidney was granted the subsidiary title of Viscount Lisle on 4 May 1605. The Sidneys retained the titles until the death of the seventh Earl in 1743, when the titles again became extinct. The title of earl was then recreated