In Croatia, Kassal families are Croats (from Crikvenica ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
About 10 people with faimily name Kassal live in Croatia today, in three households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Zagreb (<10) and Crikvenica (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1926 in source Emigration Commission Zagreb.