Only a few people with faimily name Bijak live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Turnasica in Djurdjevac area (<5), Pula (<5), Pitomaca in Djurdjevac area (<5), Vukosavljevica in Virovitica area (<5), and in Sibenik in Grubisno Polje area (<5).
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.