In Croatia, Špruk families are Croats (from Karlovac ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Zagreb.
Prevalence
About 20 people with faimily name Špruk live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Sisljavic (15), Karlovac (<10), Zagreb (<5), and in Kablar (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1928 in source Emigration Commission Zagreb.