In Croatia, Suminja families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Petrinja.
Prevalence
Only a few people with faimily name Suminja live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in only one small Croatian place, in Pustodol (<5).
Outside Croatia
Family name Suminja is present in four countries on two continents.
