In Croatia, Dejdar families are Czechs by relative majority (from Garesnica ), equally Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Garesnica.
Prevalence
About 10 people with faimily name Dejdar live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Zagreb (<5) and Sisak (<5).
Outside Croatia
Family name Dejdar (including: Deedar , Deidar , Deydhar and Deydar ) is present in 21 countries worldwide.