In Croatia, Ugljik families are Croats (from Zupanja ). In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja.
Prevalence
Only a few people with faimily name Ugljik live in Croatia today, in one household only. They are located in one Croatian city only, in Zupanja (<5).
Outside Croatia
Family name Ugljik is present in this form only in Croatia.
