In Croatia, Jančo families are generally Croats (from Djakovo area ), very rarely Slovaks (from Djakovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo area and in Djakovo area.
Prevalence
About 40 people with faimily name Jančo live in Croatia today, in 14 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties and four other places, mostly in Osijek (10), Djakovo (<10), Bracevci in Djakovo area (<10), Zagreb (<5), and in Punitovci in Djakovo area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.