In Croatia, Joos families are Croats (from Varazdinske Toplice ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin.
Prevalence
Only a few people with faimily name Joos live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only two Croatian places: in Varazdinske Toplice (<5) and Prhovec in Cakovec area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.