In Croatia, Grundler families are Croats (from Slatina ). In the past century, relatively most of Croatian residents bearing this family name were born in Slatina area and in Zagreb.
Prevalence
About 30 people with faimily name Grundler live in Croatia today, in 15 households. There were 20 of them in the middle of the past century, and their number increased by 30 percent. They are located in five Croatian cities only: in Zagreb (20), Slatina (10), Osijek (<10), Novi Vinodolski (<5), and in Kutina (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.