Meaning :gift of god,the seriousness of the club,the mace, as a young man by the name is pronounced mayce. it is the middle of english origin, and the importance of the mace is "the gravity of personal or club". a weapon of medieval knights, to break the armor. shortened form of a name such as macy's and mason; also a surname of english, a form of matthew. macerio may be a variant of macarius (g), a holy name.