Krtanjek families are Croats and they are mostly from Ivanec. In the past century, relatively most of Croatian residents bearing this family name were born in Ivanec and Varazdin.
Prevalence
About 100 people with faimily name Krtanjek live in Croatia today, in 50 households. There were 100 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 8 cities and 9 other places, mostly in Jerovec (40), Zagreb (15), Ivanec (10), Hlebine in Koprivnica area (<10), and in Kaniza (<10).
Outside Croatia
Family name Krtanjek is present in four countries on two continents. The family name "Krtanjek " is used by small number of people in the United States.
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.