In Croatia, Surko families are Croats (from Ivanec area ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Ivanec. In Koškovec in Ivanec area every sixtieth inhabitant had the family name Surko.
Prevalence
About 10 people with faimily name Surko live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian counties, threee cities and threee other places, mostly in Cerje Nebojse in Ivanec area (<10), Sisak (<10), Varazdin (<5), Staznjevec (<5), and in Ivanecki Vrhovec (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.