In Croatia, Kajkuš families are mainly Bosniaks (from Zagreb ), rarely Croats (also from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Kosovo and in Zagreb.
Prevalence
About 30 people with faimily name Kajkuš live in Croatia today, in four households only. They are located in one Croatian city only, in Zagreb (30).
Outside Croatia
Family name Kajkuš (including: Kajkus , Chaykus ) is present in three countries.