The name Breslau means Place Name and is of German origin. Breslau is name that's been used by parents who are considering unisex or non-gendered baby names--baby names that can be used for any gender.
Breslau is a place name, a Germanic/Polish city. In Polish, the city's name Wroclaw is from the name Wrocislaw, which is the Polish equivalent of the Czech name Vratislav. Breslau is an early New High German variation of the name.