In Croatia, Celenko families are Croats (from Oroslavje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Oroslavje area and in Zagreb.
Prevalence
About 30 people with faimily name Celenko live in Croatia today, in 11 households. There were 50 of them in the middle of the past century, and their number decreased by 50 percent. They are located in only five Croatian places: in Ervenik Zlatarski (10), Zagreb (<10), Ervenik Zlatarski in Oroslavje area (<10), Sesvete (<5), and in Tuhelj in Klanjec area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.