I am Marko Zdovc from Slovenia - Stajerska region.
I have seen your post here.
I live in Vojnik (near Celje). I will do a detailed research about my family tree in the future.
I have ask my grandfather many times if he knows anything about my ancestors. He was born in Lasko (Kuretno) also Stajerska region. He told me that his father remembered that surname ZDOVC goes back to the time period of Counts of Celje, where one member of a ZDOVC family was a supervisor for their land and property.
For the moment that is all I know.
Bets regards from Slovenia!
My e-mail: firstname.lastname@example.org