Mcarthur is a masculine given name of Gaelic origin, derived from the surname MacArtair and literally meaning “son of Arthur.” It entered English usage as both a family name and, more rarely, a first name, carrying echoes of Arthurian legend and a sense of leadership that recalls Roman titles such as Marcus. Pronounced muh-KAR-thur (/məˈkɑrθər/), it saw modest adoption in mid-20th-century Virginia—peaking in 1942 with 20 newborns (rank 111) before dipping to 8 births in 1943 (rank 131), 7 in 1944 (rank 128) and rising slightly to 10 in 1945 (rank 127). Today, Mcarthur remains distinctive, suggesting both historical gravitas and a subtle Latin resonancia in its cadence.