In Croatia, Dionis families are mainly Croats (from Buje ), less frequently Italians (from Umag ). In the past century, relatively most of Croatian residents bearing this family name were born in Umag and in Slovenia.
Prevalence
Only a few people with faimily name Dionis live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Krasica (<10) and Novigrad (<5).