In Croatia, Nikollaj families are predominantly Albanians (from Kosovo ), rarely Croats (from Umag ). In the past century, relatively most of Croatian residents bearing this family name were born in Kosovo and in Serbia.
Prevalence
About 20 people with faimily name Nikollaj live in Croatia today, in 9 households. They are located in 7 Croatian counties, in 6 cities and four other places, mostly in Umag (<10), Zapresic (<10), Kastel Novi (<10), Zagreb (<5), and in Kastel Stari (<5).