In Croatia, Tomc families are generally Croats (from the Island of Mljet ), very rarely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and on the Island of Mljet.
Prevalence
About 20 people with faimily name Tomc live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities, mostly in Slavonski Brod (<10), Fuskulin (<10), Dubrovnik (<5), Zagreb (<5), and in Poljane (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.