In Croatia, Gjantar families are Croats (from Ivanic-Grad ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Ivanic-Grad.
Prevalence
About 10 people with faimily name Gjantar live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Ivanic-Grad (10) and Zagreb (<5).
Outside Croatia
Family name Gjantar is present in five countries on two continents. "Gyantar " is used by small number of people in the United States.