In Croatia, Rumen families are Croats (from Buzet ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Pula.
Prevalence
About 10 people with faimily name Rumen live in Croatia today, in four households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Krbavcici (<10) and Zagreb (<5).
Outside Croatia
Family name Rumen (including: Rumeen , Rummen ) is present in 24 countries worldwide.