In Croatia, Kotlo families are generally Croats (from Zagreb ), rarely Bosniaks (also from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Kutina.
Prevalence
About 10 people with faimily name Kotlo live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in three Croatian cities only: in Zagreb (<10), Crveni Vrh (<5), and in Samobor (<5).