What is the name of this Czech bread?
I can't tell for 100% certain from that photo, but I believe it may be Houskove Knedliky, a sort of unstuffed dumpling common to many Czech dishes. The variety in your image looks similar to Houskove Knedliky v Ubrousku, literally "Bread Dumplings [cooked] in a Napkin":

http://www.trixicooks.com/2015/10/houskove-knedliky-v-ubrousku.html

You can find several recipes for that variety of houskove knedliky, though when I lived in the Czech Republic ordinary houskove knedliky (i.e. not the "in napkin" style) were far more common as sides to dishes like Svickova, Gulas, etc.:

http://recepty.vareni.cz/kynute-houskove-knedliky/

If you want to find recipes for ones made from potatoes, add the word "bramborove" to your searches. Here's one example I found:

http://www.mimibazar.cz/recept/94046/bramborove-knedliky-v-ubrousku