In Croatia, Jankač families are generally Croats (from Krizevci area ), very rarely Italians (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Koprivnica.
Prevalence
About 30 people with faimily name Jankač live in Croatia today, in 15 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities and threee other places, mostly in Zagreb (15), Sesvete (<10), Rijeka (<10), Dedina in Krizevci area (<5), and in Velika Gorica (<5).
Outside Croatia
Family name Jankač (including: Jankac , Yankachi , Yankaci and Yankac ) is present in 7 countries on four continents.
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.