casual, generic term of address for a man, 1928, from Ir. & Gaelic
mac, from O.Celt.
*makko-s "son;" a common prefix in Scottish and Irish names, hence, used generally from early 19c. for a Celtic Irishman. Cognate root
*makwos "son" produced O.Welsh
map, Welsh
mab, ap "son;" also probably cognate with O.E.
mago "son, attendant, servant," O.N.
mögr "son," Goth.
magus "boy, servant," O.E.
mægð "maid" (see
maiden).