In Croatia, Tomasich families are predominantly Italians (from Buje ), rarely Croats (also from Buje ). In the past century, relatively most of Croatian residents bearing this family name were born in Buje and Rijeka. In Seget in Umag every sixth inhabitant had the family name Tomasich.
Prevalence
About 10 people with faimily name Tomasich live in Croatia today, in three households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only four naselja i to in Rijeka (<5), Umag (<5), Plovanija (<5), and in Buje (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned about one hundred times, the first time 1729 in source Catholic Church Parish Records.