After the legendary expulsion of the last King, Tarquin the Proud, a harsh ruler at the end of the Roman Kingdom, most of the powers and authority of the king were ostensibly given to the newly instituted consulship. This change in leadership came about when the king's son, Sextus Tarquinius, raped the wives and daughters of powerful Roman nobles. A group of nobles led by Lucius Junius Brutus, with the support of the Roman Army, expelled Tarquinius and his family from Rome in 509 BC. Originally, consuls were called praetors ("leader"), referring to their duties as the chief military commanders. By at least 300 BC the title of Consul became commonly used. Ancient writers usually derive the title "consul" from the Latin verb "consulere", "to take counsel", but this is most likely a later gloss of the term, which probably derives—in view of the joint nature of the office—from "con-" and "sal-", "get together" or from "con-" and "sell-/sedl-", "sit down together with" or "next to". In Greek, the title was originally rendered as , "strategos hypatos" ("the supreme general"), and later simply as ὕπατος.