In Croatia, Sergon families are Slovenes by relative majority (from Niksic, Montenegro ), rarely Croats (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Niksic, Montenegro.
Prevalence
Only a few people with faimily name Sergon live in Croatia today, in two households only. They are located in one Croatian city only, in Zagreb (<5).
Outside Croatia
Family name Sergon is present in 16 countries worldwide.