Polenus families are Croats and they are mostly from Daruvar. In the past century, relatively most of Croatian residents bearing this family name were born in Daruvar and Pakrac.
Prevalence
About 90 people with faimily name Polenus live in Croatia today, in 40 households. There were 40 of them in the middle of the past century, and their number doubled. They are located in four Croatian counties and 7 other places, mostly in Daruvar (20), Zagreb (10), Sirac in Daruvar area (10), Doljani (<10), and in Golo Brdo (<10).
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.