In Croatia, Čajavec families are Croats (from Varazdin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Zagreb.
Prevalence
About 30 people with faimily name Čajavec live in Croatia today, in 12 households. There were 40 of them in the middle of the past century, and their number decreased by 10 percent. They are located in four Croatian counties and 5 other places, mostly in Bartolovec in Varazdin area (<10), Zbelava (<10), Zagreb (<5), and in Trnovec (<5) and Petrijanec (<5) in Varazdin area.
Outside Croatia
Family name Čajavec (including: Cajavec , Cayavec ) is present in five countries on two continents. "Cayavec " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.