Nikolaj is a male name, in Croatia principally Croatian, but also Slovenian, Ukrainian, Ruthenian, Russian and Romanian. It is one of the medium frequent names in Croatia, with about eighty namesakes living there.
The relative popularity of names Nikolaj in Croatia
The name Nikolaj was the most popular from years 1923 to 1932, when about 26% of the persons bearing this name were born. The peak year was 1923.
Prevalence
Name Nikolaj is present mainly in North-West Croatia, and scarcely in Central Croatia. Most of the persons named Nikolaj live in the following cities and municipalities: Zagreb (less than ten), Split (less than ten), Dvor (less than ten).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1927 in source Emigration Commission Zagreb.