Bajs families are Croats and they are mostly from Zlatar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zlatar area.
Prevalence
About 350 people with faimily name Bajs live in Croatia today, in 150 households. There were 440 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 22 cities and 48 other places, mostly in Zagreb (85), Selnica in Zlatar area (35), Varazdin (15), Cret Bizovacki in Valpovo area (15), and in Osijek (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.