In Croatia, Uljenik families are generally Italians (from Buje ), rarely Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Buje and Umag.
Prevalence
About 10 people with faimily name Uljenik live in Croatia today, in three households only. They are located in two Croatian cities only, in Triban (<10) and Zagreb (<5).
Outside Croatia
Family name Uljenik is present in this form only in Croatia.