Kumer families are predominantly Croats and they are mostly from Varazdin area , less frequently Slovenes (from Slovenia ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Rijeka.
Prevalence
About 160 people with faimily name Kumer live in Croatia today, in 70 households. There were 120 of them in the middle of the past century, and their number increased by 30 percent. They are located in the most of Croatian counties, in 15 cities and 23 other places, mostly in Zagreb (35), Osijek (10), Rijeka (<10), Pazin (<10), and in Narta in Cazma area (<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.