In Croatia, Ballon families are Croats (from Oroslavje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Oroslavje area.
Only a few people with faimily name Ballon live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two Croatian places: in Zagreb (<10) and Modrovec in Donja Stubica area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.