In Croatia, Grižančić families are generally Croats (from Buzet ), rarely Italians (from Buje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Buzet and in Slovenia. In Seljaci in Buzet nearly every inhabitant had the family name Grižančić.
Prevalence
About 40 people with faimily name Grižančić live in Croatia today, in 17 households. There were 70 of them in the middle of the past century, and their number decreased by 40 percent. They are only located in four Croatian cities and 9 other places, mostly in Umag (<10), Labin (<5), Sveti Martin (<5), Brtonigla in Buje area (<5), and in Seget (<5).
Outside Croatia
Family name Grižančić is present in five countries on three continents. The family name "Grizancic " is used by small number of people in the United States.