In Croatia, Klaser families are generally Croats (from Krapina ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Banja Luka Region, Bosnia (Laktasi area).
Prevalence
Only a few people with faimily name Klaser live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Slavonski Brod (<5) and Krapina (<5).