Where does “Navotas” come from?

Navotas (Spanish) comes from Tagalog nabutas, from Tagalog na, from Proto-Austronesian *na.

Ancestry of “Navotas”, step by step

Step	Language	Word	Meaning
1	Tagalog	nabutas	—
2	Tagalog	na	already; now; now; already; connects adjectives...
3	Proto-Austronesian	*na	—