Where does “bakla” come from?

bakla (Bikol Central) comes from Tagalog bakla, from Spanish -a, from Old Spanish -a.

Ancestry of “bakla”, step by step

Step	Language	Word	Meaning
1	Tagalog	bakla	effeminate man; fag; gay male; hermaphrodite
2	Spanish	-a	-ess used to form feminine singular nouns; used...
3	Old Spanish	-a	—