In Croatia, Jellenich families are predominantly Italians (from Porec ), rarely Croats (also from Porec ). In the past century, relatively most of Croatian residents bearing this family name were born in Porec and Pula.
Prevalence
Only a few people with faimily name Jellenich live in Croatia today, in three households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, in one city and another small place , mostly in Porec (<5) and Viskovo in Rijeka area (<5).
Outside Croatia
Family name Jellenich is present in three countries on two continents. The family name "Jellenich " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.