In Croatia, Košut families are Roms (from Sisak area ).
Prevalence
Only a few people with faimily name Košut live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in only two Croatian places: in Sisak (<5) and Strelecko in Sisak area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.