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 Clare the late eleventh and twelfth centuries, and the Clares were one of a handful referred to as earls in this period without a county mentioned. For example, Gerald of Wales recounts an incident relating to the Earl of Clare, possibly referring to William Fitz Robert, 2nd Earl of Gloucester. Such references led some older historians to assume the Earls of Gloucester and Hertford also carried the title Earls of Clare. The title, for instance, is given in the original "Dictionary of National Biography". The confusion probably stems from misinterpretation of references, such as that of "Earl Gilbert de Clare", in