In Croatia, Drlan families are Croats (from Pregrada ). In the past century, relatively most of Croatian residents bearing this family name were born in Pregrada and Zagreb.
Prevalence
About 10 people with faimily name Drlan 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 Kostel (<10), Kutina (<5), Pregrada (<5), Dubrovnik (<5), and in Ilova (<5).
Outside Croatia
Family name Drlan is present in 6 countries on four continents. "Derlan " is used by some 100 people in Brazil , small number in Indonesia , and small number of people in the United States.