In Croatia, Mattias families are predominantly Croats (from Pula ), rarely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Pula.
Prevalence
Only a few people with faimily name Mattias live in Croatia today, in three households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Rijeka (<5) and Pula (<5).