Crnko families are Croats and they are mostly from Hrvatska Kostajnica area. In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Zagreb. In Sunja in Hrvatska Kostajnica area every fourtieth inhabitant had the family name Crnko.
Prevalence
About 110 people with faimily name Crnko live in Croatia today, in 50 households. There were 90 of them in the middle of the past century, and their number increased by 20 percent. They are located in 7 Croatian counties, in 9 cities and 13 other places, mostly in Zagreb (25), Sunja in Hrvatska Kostajnica area (15), Jalzabet in Ludbreg area (15), Kraljeva Velika in Novska area (<10), and in Rijeka (<10).
Outside Croatia
Family name Crnko (including: Chrnko , Cernko ) is present in 13 countries on four continents. The family name "Crnko " is used by some 100 people in the United States , about 100 in Argentina , and small number of people in Canada. "Chrnko " 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 over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.
