Where does “ano” come from?

ano (Bikol Central) comes from Proto-Philippine *anuh, from Proto-Malayo-Polynesian anu, from Proto-Austronesian (na-)nu — what.

Ancestry of “ano”, step by step

StepLanguageWordMeaning
1Proto-Philippine*anuhwhat? interrogative pronoun
2Proto-Malayo-Polynesiananuwhat?
3Proto-Austronesian(na-)nuwhat

Words derived from “ano”

Every word from Proto-Austronesian (na-)nu →Every word from Proto-Malayo-Polynesian anu →Every word from Proto-Philippine *anuh →