In Croatia, Bajsec families are Croats (from Dugo Selo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Dugo Selo area.
Prevalence
Only a few people with faimily name Bajsec live in Croatia today, in one household only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in only one small Croatian place, in Precno (<5).
Outside Croatia
Family name Bajsec (including: Baysec , Baisez ) is present in 8 countries on three continents. The family name "Bajsec " is used by small number of people in the United States.