In Croatia, Hviždalek families are Croats (from Kraljevica ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Kraljevica.
Prevalence
Only a few people with faimily name Hviždalek live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in three Croatian cities only: in Smrika (<10), Zagreb (<5), and in Rijeka (<5).
Outside Croatia
Family name Hviždalek is present in this form only in Croatia.