Where does “パンパンガ” come from?

パンパンガ (Japanese) comes from Kapampangan Pampanga, from Spanish Pampanga, from Spanish -a, from Latin -a, from Proto-Italic -ā, from Proto-Indo-European -éh₂.

Ancestry of “パンパンガ”, step by step

Step	Language	Word	Meaning
1	Kapampangan	Pampanga	—
2	Spanish	Pampanga	—
3	Spanish	-a	-ess used to form feminine singular nouns; used...
4	Latin	-a	suffixed to the roots of verbs, forms agent...
5	Proto-Italic	-ā	Forms masculine agent nouns from prefixed or compounded bases
6	Proto-Indo-European	-éh₂	—

Every word from Proto-Indo-European -éh₂ →Every word from Latin -a →Every word from Spanish -a →