Grgečić families are Croats and they are mostly from Samobor. In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and Zagreb.
Prevalence
About 100 people with faimily name Grgečić live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number increased by 30 percent. They are located in two Croatian counties, four cities and 6 other places, mostly in Braslovje (55), Samobor (20), Mala Jazbina (10), Rude (<10), and in Malunje (<10).
Outside Croatia
Family name Grgečić is present in two countries on two continents. The family name "Grgecic " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.