In Croatia, Janjčec families are Croats (from Zabok area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zabok area and in Zagreb.
Prevalence
About 10 people with faimily name Janjčec live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only threee Croatian places: in Grabrovec (<10), Zagreb (<5), and in Strucljevo in Zabok area (<5).
Outside Croatia
Family name Janjčec is present in this form only in Croatia.
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.