Only a few people with faimily name Tomašin live in Croatia today, in four households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian counties, in one city and another small place , mostly in Zagreb (<5) and Lastovo on the Island of Lastovo (<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.