In Croatia, Trlek families are Croats (from Slavonski Brod ). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod and in Zupanja area.
Prevalence
About 20 people with faimily name Trlek live in Croatia today, in 8 households. They are located in only four naselja i to in Slavonski Brod (10), Druzilovec in Zabok area (<5), Zagreb (<5), and in Konjscina in Zlatar area (<5).
Outside Croatia
Family name Trlek is present in three countries on two continents. "Terleck " is used by small number of people in the United States.