In Croatia, Pianec families are Croats (from Koprivnica ). In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica and Cakovec.
Prevalence
About 20 people with faimily name Pianec live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in three Croatian cities only: in Koprivnica (<10), Prelog (<10), and in Novi Djurdjic (<5).