In Croatia, Trnar families are Croats (from Samobor ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zabok area.
Prevalence
About 10 people with faimily name Trnar live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only five naselja i to in Samobor (<10), Hrastina Samoborska (<5), Sveta Nedelja in Samobor area (<5), Selno in Krapina area (<5), and in Pavlovec Pregradski (<5).
Outside Croatia
Family name Trnar is present in 15 countries worldwide.