In Croatia, Gravonja families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Orahovica area. In Balinci in Orahovica area every thirtieth inhabitant had the family name Gravonja.
Prevalence
Only a few people with faimily name Gravonja live in Croatia today, in one household only. They are located in one Croatian city only, in Slatina (<5).