In Croatia, Filek families are almost entirely Croats (from Novi Marof ), very rarely Slovenes. In the past century, relatively most of Croatian residents bearing this family name were born in Novi Marof and Osijek.
Prevalence
About 30 people with faimily name Filek live in Croatia today, in 13 households. There were 20 of them in the middle of the past century, and their number increased by 60 percent. They are located in 7 Croatian counties, in 7 cities and four other places, mostly in Podrute (<10), Tominovac in Orahovica area (<10), Osijek (<5), Zadar (<5), and in Velika Gorica (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.