In Croatia, Castro families are predominantly Italians (from Pula ), rarely Croats (also from Pula ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula.
Prevalence
Only a few people with faimily name Castro live in Croatia today, in two households only. There were 20 of them in the middle of the past century, and their number halved. They are located in one Croatian city only, in Pula (<5).