Where does “petropolitano” come from?

petropolitano (Portuguese) comes from Portuguese Petrópolis, from Latin Petrus, from Indonesian penembak, from Indonesian tembak, from Malay tembak, from Malay timbak, from Proto-Malayic timbak, from Proto-Malayo-Polynesian ti(m)bak.

Ancestry of “petropolitano”, step by step

Step	Language	Word	Meaning
1	Portuguese	Petrópolis	—
2	Latin	Petrus	Peter
3	Indonesian	penembak	shooter
4	Indonesian	tembak	to shoot to fire a shot
5	Malay	tembak	to shoot
6	Malay	timbak	Obsolete form of tembak
7	Proto-Malayic	timbak	—
8	Proto-Malayo-Polynesian	ti(m)bak	—

Every word from Proto-Malayo-Polynesian ti(m)bak →Every word from Proto-Malayic timbak →Every word from Malay timbak →