In Croatia, Diacci families are Croats (from the Island of Cres ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin and Rijeka.
Prevalence
About 10 people with faimily name Diacci live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Cres on the Island of Cres (<10), Labin (<5), Vinez (<5), and in Rogocana (<5).
Outside Croatia
At least five families with this surname emigrated from Croatia to the United States (4) and France (1). Family name Diacci is present in 16 countries worldwide.