In Croatia, Kojan families are Croats (from Dubrovnik area ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and in Dubrovnik area. In Popovići in Dubrovnik area every twentieth inhabitant had the family name Kojan.
Prevalence
About 20 people with faimily name Kojan live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in two Croatian counties, two cities and four other places, mostly in Popovici in Dubrovnik area (<10), Mokosica (<5), Zagreb (<5), and in Kupari (<5) and Gruda (<5) in Dubrovnik area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.