In Croatia, Sanko families are Croats (from Cazma area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Cazma area.
Prevalence
About 10 people with faimily name Sanko live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Trogir (<5), Zabnica in Cazma area (<5), Split (<5), Dubrovnik (<5), and in Podgora in Makarska area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.