Where does “tano” come from?

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

Ancestry of “tano”, step by step

tano traces back through two separate lines of ancestry.

via Bikol Central ano

StepLanguageWordMeaning
1Bikol Centralano—
2Proto-Philippine*anuhwhat? interrogative pronoun
3Proto-Malayo-Polynesiananuwhat?
4Proto-Austronesian(na-)nuwhat

via Bikol Central ta

StepLanguageWordMeaning
1Bikol Centralta—
2Proto-Philippine*taq—
Every word from Proto-Austronesian (na-)nu →Every word from Proto-Malayo-Polynesian anu →Every word from Proto-Philippine *anuh →