Grego families are Croats and they are mostly from the Island of Korcula. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and on the Island of Korcula.
Prevalence
About 100 people with faimily name Grego live in Croatia today, in 60 households. There were 160 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 7 Croatian counties, in 13 cities and 8 other places, mostly in Rijeka (15), Zagreb (15), Omisalj on the Island of Krk (15), Blato on the Island of Korcula (10), and in Orebic on the Peljesac peninsula (<10).
Outside Croatia
At least eight families with this surname emigrated from Croatia to the United States (4) and Chile (4). Family name Grego (including: Greggio , Greggo and Gerego ) is present in 58 countries worldwide. The family name "Grego " is used by some 9000 people in Brazil , about 2000 in Italy , and some 2000 people in the United States. "Greggo " is used by some 200 people in the United States and about 100 in Brazil.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1729 in source Catholic Church Parish Records.
