Where does “barreirense” come from?

barreirense (Portuguese) comes from Portuguese barreiro, from Portuguese -eiro, from Old Portuguese -eiro, from Latin -arium, from Latin -arius, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “barreirense”, step by step

barreirense traces back through 3 separate lines of ancestry.

via Portuguese barreiro

Step	Language	Word	Meaning
1	Portuguese	barreiro	slough; clay pit
2	Portuguese	-eiro	-er; -eer; forms nouns, from nouns denoting a...
3	Old Portuguese	-eiro	-eer
4	Latin	-arium	Used to form nouns denoting a "place where things...
5	Latin	-arius	Used to form adjectives from nouns or numerals;...
6	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

via Portuguese barreira

Step	Language	Word	Meaning
1	Portuguese	barreira	barrier; hurdle
2	Old Portuguese	barreira	—

via Portuguese Barreiras

Step	Language	Word	Meaning
1	Portuguese	Barreiras	—

Every word from Proto-Indo-European -yós →Every word from Portuguese -eiro →Every word from Latin -arius →