Suljo is a male name, in Croatia largely Croatian, but also Muslim, Albanian and Romany. It is one of the relatively common names (among the top two thousand) in Croatia, with over a hundred namesakes living there.
The relative popularity of names Suljo in Croatia
The name Suljo was the most popular from years 1954 to 1962. The peak year was 1955.
Prevalence
Name Suljo is present mainly in North-West Croatia, and scarcely in Dalmatia. Most of the persons named Suljo live in the following cities and municipalities: Zagreb (about thirty), Rijeka (less than ten), Split (less than ten).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1938 in source Phone Book - Zagreb 1938.