usurpator

noun

1. A usurper.

   “Great God restore us our liberties, / With our ancient Laws and Customes, / Under the Iron yoak of Usurpators, / And lead us not”

   “It was because Esarhaddon was stronger than his brothers that his brothers went down in history as usurpators. Had the power relations been different, the titles would also have been assigned accordingly. It is striking that the expression ‘a king who trusts in his own strength’ is also used for usurpators.”