In Croatia, Grguričin families are almost entirely Croats (from Sibenik ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Split.
Prevalence
About 30 people with faimily name Grguričin live in Croatia today, in 18 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Sibenik (25), Zirje (<10), Cres on the Island of Cres (<5), and in Rijeka (<5).
Outside Croatia
Family name Grguričin is present in three countries.