In Croatia, Klees families are predominantly Croats (from Rijeka area ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
Only a few people with faimily name Klees live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in only threee Croatian places: in Rijeka (<5), Hreljin (<5), and in Grobnik in Rijeka area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1933 in source Emigration Commission Zagreb.