Drežnjak families are Croats and they are mostly from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Mostar area) and in Rama, Bosnia (Prozor area). In Goranci in Herzegovina every ninth inhabitant had the family name Drežnjak.
Prevalence
About 130 people with faimily name Drežnjak live in Croatia today, in 50 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 20 cities and 14 other places, mostly in Zagreb (25), Vinkovci (15), Kuzmica (15), Pozega (10), and in Cerna in Zupanja area (10).
Outside Croatia
Family name Drežnjak is present in 6 countries on two continents.
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.