In Croatia, Geriol families are Croats (from Kraljevica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Geriol live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in only one small Croatian place, in Fuzine in Kraljevica area (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Geriol is present in three countries on two continents. "Geryol " is used by small number of people in the United States.