In Croatia, Renier families are generally Croats (from Pula ), rarely Italians (from Pazin ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Pazin.
Prevalence
About 10 people with faimily name Renier live in Croatia today, in four households only. They are located in two Croatian cities only, in Rijeka (<5) and Pula (<5).