In Croatia, Robek 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 Robek live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number halved. They are located and another small Croatian place , mostly in Zagreb (<10), Sisak (<5), Ivanic-Grad (<5), Split (<5), and in Cabar (<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.