Cajner families are Croats and they are mostly from Bjelovar area. In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and Zagreb.
Prevalence
About 80 people with faimily name Cajner live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 7 cities and 9 other places, mostly in Bjelovar (15), Velika Gorica (10), Gornje Plavnice (10), Zagreb (<10), and in Vinkovci (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.