In Croatia, Hamm families are generally Croats (from Belisce area ), very rarely Poles. In the past century, relatively most of Croatian residents bearing this family name were born in Belisce and in Belisce area.
Prevalence
About 10 people with faimily name Hamm live in Croatia today, in four households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only four naselja i to in Crnkovci in Belisce area (<5), Split (<5), Vukovar (<5), and in Marijanci in Belisce area (<5).