Where does “aka” come from?

aka (Proto-Nuclear Polynesian) comes from Proto-Polynesian aka, from Proto-Oceanic (w)akaʀ, from Proto-Eastern Malayo-Polynesian (w)akaʀ, from Proto-Central-Eastern Malayo-Polynesian (w)akaʀ, from Proto-Malayo-Polynesian *wakaʀ — root.

aka (Proto-Nuclear Polynesian): root