In Croatia, Sumar families are Croats (from Pozega ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Pozega.
Prevalence
Only a few people with faimily name Sumar live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in three Croatian cities only: in Pozega (<5), Zagreb (<5), and in Krk on the Island of Krk (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1932 in source Emigration Commission Zagreb.