Gajdek families are Croats and they are mostly from Glina. In the past century, relatively most of Croatian residents bearing this family name were born in Glina and Sisak.
Prevalence
About 160 people with faimily name Gajdek live in Croatia today, in 70 households. There were 230 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 13 cities and 16 other places, mostly in Sisak (30), Satornja (25), Veliko Svinjicko (20), Hotnja in Glina area (20), and in Zagreb (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.