:::::You beat me to it!  )  I just looked that up a moment ago.  So, there are two possible conclusions: 
 :::::1.) There is, or was, a place (city, town, small village, whatever) in the former East Germany named Breslau, and Rattler was born there. 
 :::::2.) If there never was such a place, then there has been a long-lasting editorial mistake.  In this case, we should merely say that he was born in Germany, and leave a footnote to the effect that the information in the Handbooks is inaccurate.