Tomaić families are Croats and they are mostly from Senj. According to some sources they are from Zadra area. In the past century, relatively most of Croatian residents bearing this family name were born in Senj and Rijeka.
Prevalence
About 290 people with faimily name Tomaić live in Croatia today, in 130 households. There were 170 of them in the middle of the past century, and their number increased by 70 percent. They are located in the most of Croatian counties, in 23 cities and 29 other places, mostly in Zagreb (40), Rijeka (30), Krasno Polje (30), Senj (25), and in Kutina (15).
Outside Croatia
Family name Tomaić (including: Tomaic , Tomaich ) is present in 9 countries on four continents. "Tomaich " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.