Where does “Cotabato” come from?

Cotabato (English) comes from Spanish Cotabato, from Maguindanao Kutawatu, from Maguindanao watu, from Proto-Philippine *batu, from Proto-Malayo-Polynesian batu, from Proto-Austronesian *batux — rock; stone.

Ancestry of “Cotabato”, step by step

StepLanguageWordMeaning
1SpanishCotabato—
2MaguindanaoKutawatu—
3Maguindanaowatustone; rock
4Proto-Philippine*batustone substance; small piece of stone
5Proto-Malayo-Polynesianbatustone
6Proto-Austronesian*batuxrock; stone

Words derived from “Cotabato”

Every word from Proto-Austronesian *batux →Every word from Proto-Malayo-Polynesian batu →Every word from Proto-Philippine *batu →