Only a few people with faimily name Diviak live in Croatia today, in 0 households. There were 0 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Ilok (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.