In Croatia, Oljenik families are Croats (from Slavonski Brod area ). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod area and in Slavonski Brod. In Garčin in Slavonski Brod area every fiftieth inhabitant had the family name Oljenik.
Prevalence
About 20 people with faimily name Oljenik live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, two cities and another small place , mostly in Garcin in Slavonski Brod area (15), Slavonski Brod (<5), and in Varazdin (<5).