In Croatia, Kes families are Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Donji Miholjac and on the Island of Krk.
Prevalence
Only a few people with faimily name Kes live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in three Croatian cities only: in Zagreb (<5), Rijeka (<5), and in Osijek (<5).
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.