In Croatia, Kuluz families are Croats (from the Island of Hvar ). In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Hvar and in Makarska.
Prevalence
About 10 people with faimily name Kuluz live in Croatia today, in five households only. They are only located in two Croatian cities and another small place , mostly in Sucuraj on the Island of Hvar (<10), Makarska (<10), and in Split (<5).
Outside Croatia
Family name Kuluz is present in 8 countries worldwide. The family name "Kuluz " is used by small number of people in the United States and small number in Iran.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1928 in source Emigration Commission Zagreb.