In Croatia, Horkaš families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Zagreb.
Prevalence
About 10 people with faimily name Horkaš live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian cities only, in Zagreb (<10) and Sisak (<10).
Outside Croatia
Family name Horkaš (including: Horcas , Horkas ) is present in 9 countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.