Kulfa families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Zlatar.
Prevalence
About 80 people with faimily name Kulfa live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 70 percent. They are located in four Croatian counties and 7 other places, mostly in Zagreb (15), Donje Jesenje in Krapina area (15), Zlatar (10), Lobor in Zlatar area (10), and in Zapresic (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.