In Croatia, Deroja families are Croats (from the Island of Losinj ). In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Losinj.
Prevalence
Only a few people with faimily name Deroja live in Croatia today, in three households only. They are located in only two naselja i to in Unije (<5) and Mali Losinj (<5) on the Island of Losinj.