Agnew is an uncommon given name of English origin, derived from the Scottish surname Agnew which is an Anglicized form of the Gaelic MacAonghusa. The name is believed to mean "son of Angus," where Angus refers to a personal name meaning "one" or "victory." It was historically used as a patronymic surname before becoming more commonly used as a given name in recent times.
The name Agnew experienced a dip in popularity between 1912 and 1924, with only five births recorded in both 1923 and 1924 combined, compared to seven births each in 1912 and 1921. However, there was a resurgence in its usage after three decades, with six births recorded in 1946 and five more in 1953. Overall, the name Agnew has seen a total of thirty-five births over this period.