In Croatia, Froglia families are Italians (from Rijeka ).
Prevalence
Only a few people with faimily name Froglia live in Croatia today, in one household only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Rijeka (<5).
Outside Croatia
Family name Froglia is present in 6 countries on three continents. The family name "Froglia " is used by some 60 people in Italy , small number in Argentina , and small number of people in the United States. "Feroglia " is used by small number of people in the United States and small number in Mexico.