Zanjko families are Croats and they are mostly from Cakovec area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Cakovec.
Prevalence
About 80 people with faimily name Zanjko live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 70 percent. They are located in two Croatian counties, two cities and 11 other places, mostly in Cakovec (25), Zagreb (10), in Okrugli Vrh (10) and Nedelisce (<10) in Cakovec area, and in Mihovljan (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.