Jadreško families are Croats and they are mostly from the Island of Pasman. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and on the Island of Pasman. In Mrljane on the Island of Pasman every tenth inhabitant had the family name Jadreško.
Prevalence
About 130 people with faimily name Jadreško live in Croatia today, in 60 households. There were 120 of them in the middle of the past century, and their number increased by 10 percent. They are located in 8 Croatian counties, in 10 cities and 9 other places, mostly in Pula (30), Jadreski in Pula area (30), Mrljane on the Island of Pasman (25), Zadar (10), and in Metkovic (10).
Outside Croatia
Family name Jadreško is present in four countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.