Where does “kababawan” come from?

kababawan (Bikol Central) comes from Bikol Central babaw, from Proto-Malayo-Polynesian *babaw, from Proto-Austronesian *babaw — upper surface.

Ancestry of “kababawan”, step by step

kababawan traces back through two separate lines of ancestry.

via Bikol Central babaw

StepLanguageWordMeaning
1Bikol Centralbabaw
2Proto-Malayo-Polynesian*babaw
3Proto-Austronesian*babawupper surface

via Bikol Central ka- -an

StepLanguageWordMeaning
1Bikol Centralka- -an
Every word from Proto-Austronesian *babaw