In Croatia, Drevenšek families are predominantly Croats (from Osijek area ), rarely Slovenes (from Slovenia ), and very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Pozega.
Prevalence
About 20 people with faimily name Drevenšek live in Croatia today, in 12 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties and two other places, mostly in Zagreb (<10), Dugo Selo (<5), Zadar (<5), Sisak (<5), and in Brezova Gora in Lepoglava area (<5).
Outside Croatia
Family name Drevenšek is present in four countries on three continents. The family name "Drevensek " is used by small number of people in the United States and small number in France.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.