In Croatia, Kuderna families are Croats (from Rijeka area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
About 10 people with faimily name Kuderna live in Croatia today, in 6 households. They are located in only four Croatian places: in Marinici in Rijeka area (<10), Rijeka (<5), Mali Losinj on the Island of Losinj (<5), and in Ratulje in Rijeka area (<5).
Outside Croatia
Family name Kuderna is present in 12 countries on three continents. The family name "Kuderna " is used by some 300 people in Germany , about 90 in Austria , and some 70 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 1902 in source Hartmann's General List of Apartments in Zagreb.