Those look yummy! When you were first describing them I thought it was like the kolaches my grandmother used to make. But those have the filling in the center of the dough instead. And she was from Czechoslovakia, which may or may not be Eastern European. More like Central I think.
Rugulach are soft and quite small. I think kolaches are crispy? (Covered in powdered sugar?) My husband likes chocolate ones and I prefer the cinnamon ones.