In Croatia, Orešan families are Croats (from Sveti Ivan Zelina area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sveti Ivan Zelina and in Zupanja area.
Prevalence
About 20 people with faimily name Orešan 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 only four Croatian places: in Omamno in Sveti Ivan Zelina area (<10), Sesvete (<10), Biskupec Zelinski (<10), and in Osijek (<5).
Outside Croatia
Family name Orešan (including: Oresan , Oreshan ) is present in four countries on two continents. "Oreshan " is used by small number of people in the United States.