In Croatia, Weis families are Croats (from Zadar ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosnian Krajina (Teslic area).
Prevalence
About 20 people with faimily name Weis live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Zagreb (<5) and Zadar (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over a hundred times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.