McArthur is a Scottish surname meaning "son of Arthur" in Gaelic. It is a patronymic surname, derived from the given name Arthur. The name originates from the Scottish Gaelic Mac Artair and the Irish Mac Artúir, both meaning "son of Arthur." Etymology and History The root name Arthur has uncertain etymology. It may derive from the Celtic elements arth ("bear") and gur ("man") or ri ("king"). Alternatively, it could be connected to the Roman family name Artorius. Arthur is the legendary 6th-century king of the Britons, central to Arthurian legend. The surname McArthur reflects the Gaelic naming tradition of using Mac ("son of") followed by the father's name. Variants and Distribution Alternate forms of the surname include MacArthur, McArtor, and McCarter. Related surnames in other languages include the English Arthurson and Swedish Arthursson, all sharing the same patronymic meaning. According to the 2010 United States Census, the surname is ranked 2844th in frequency. Notable Bearers While specific notable individuals named McArthur are not widely documented, the name is firmly rooted in Scottish and Irish heritage. The legendary King Arthur and the widespread use of the given name later gave rise to various patronymic surnames across the British Isles and Scandinavia. Toponymy McArthur has also become a place name in the United States, including a census-designated place in Shasta County, California; an unincorporated community in Modoc County, California; and a village, the county seat of Vinton County, Ohio. Meaning: Son of Arthur Origin: Scottish and Irish Gaelic Type: Patronymic surname Alternatives: MacArthur, McArtor, McCarter Regions: Scotland, Ireland, United States