In Croatia, Ratko families are generally Croats (from Kastav ), very rarely Hungarians (from Osijek area ), and barely Slovenes (also from Osijek area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Osijek. In Jalševec Nartski in Dugo Selo area every eighth inhabitant had the family name Ratko.
Prevalence
About 50 people with faimily name Ratko live in Croatia today, in 20 households. There were 90 of them in the middle of the past century, and their number decreased by 50 percent. They are located in 6 Croatian counties, in 7 cities and 7 other places, mostly in Sesvete (10), Bilje in Osijek area (<10), Zagreb (<10), Kastav (<10), and in Dobrodol (<10).
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.