From Wrocisław, Wrócisław or Warcisław, an Old Polish given name, cognate of the Czech given name Vratislav. The name is derived from wrócić(“to return, archaically: to give back, to defeat a foe, to force to flee”) + -sław(“name, respect, glory, reputation”). Traditionally considered to be named after Vratislaus I, Duke of Bohemia, the legendary founder of the city. However, this hypothesis is problematic, since the first records of the city's existence are several decades later than the death of Vratislaus I.