Grašo families are Croats and they are mostly from the Island of Pag. In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Pag and in Zagreb.
Prevalence
About 100 people with faimily name Grašo live in Croatia today, in 40 households. They are located in 9 Croatian counties, in 13 cities and threee other places, mostly in Pag on the Island of Pag (30), Zagreb (25), Split (15), Pula (<10), and in Rijeka (<10).
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.