Where does “Pià” come from?

Pià (Catalan) comes from Latin Appiānus, from Latin Appius, from Latin Attius.

Ancestry of “Pià”, step by step

Step	Language	Word	Meaning
1	Latin	Appiānus	Of or pertaining to Appius
2	Latin	Appius	Appian
3	Latin	Attius	—