In Croatia, Kvajo families are Croats (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
About 20 people with faimily name Kvajo live in Croatia today, in 6 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in two Croatian cities only, in Rijeka (10) and Buje (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Kvajo is present in four countries on three continents.