In Croatia, Špilek families are Croats (from Prelog area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Prelog area.
Prevalence
About 50 people with faimily name Špilek live in Croatia today, in 18 households. There were 20 of them in the middle of the past century, and their number more than doubled. They are located in threee Croatian counties, two cities and 6 other places, mostly in Zagreb (20), in Turcisce (15) and Donji Hrascan (<5) in Prelog area, Sesvete (<5), and in Strelec in Cakovec area (<5).
Outside Croatia
Family name Špilek (including: Spilek , Spelec ) is present in 7 countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.