In Croatia, Happ families are almost entirely Croats (from Ludbreg area ), very rarely Slovenes (from Velika Gorica ). In the past century, relatively most of Croatian residents bearing this family name were born in Ludbreg area and in Zagreb.
Prevalence
About 40 people with faimily name Happ live in Croatia today, in 14 households. They are only located in in 6 Croatian cities and 5 other places, mostly in Zagreb (10), Velika Gorica (<10), Ludbreg (<10), Kucan Ludbreski (<5), and in Vrbovec (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1927 in source Emigration Commission Zagreb.