In Croatia, Nonveiller families are Croats (from the Island of Krk ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Split.
Prevalence
About 20 people with faimily name Nonveiller live in Croatia today, in 14 households. There were 40 of them in the middle of the past century, and their number halved. They are located in four Croatian counties and two other places, mostly in Zagreb (10), Dubrovnik (<10), Rijeka (<5), Supetar on the Island of Brac (<5), and in Dobrinj on the Island of Krk (<5).
Outside Croatia
Family name Nonveiller is present in 8 countries on three continents.