Millar \m(il)-lar\ as a boy's name is a variant of Miller (Old English), and the meaning of Millar is "one who grinds grain".

The baby name Millar sounds like Myller and Muller. Other similar baby names are Millard, Milan, Hillary, Hilar, Hiller, Lollar, Mellan, Millerd, Millen, Mills and Tilar.