The names are Sprewanen and Heveller  - why Sprevjane and Havolane in Wikipedia ??? The overwhelming majority of google search results and books show Sprewanen for a former  tribe in Berlin area.   Sprevjane  400 appr  Sprewanen over 1600     16 books Sprewanen  [http://books.google.com/books?q=sprevjane&btnG;=Search+Books&as;_brr=0  sprevjane  3 books Sprevjane   The same goes for the related Heveller in the same Berlin area  Over 200 books: Heveller   [Havolane http://books.google.com/books?q=havolane&btnG;=Search+Books&as;_brr=0 2 books: Havolane  Why are the odd unknown names Sprevjane and Havolane pushed in wikipedia???