\pstree[nodesep=2pt,levelsep=20pt]{\TR{grandfather}}
  {\pstree{\TR{uncle}}{\TR{cousin}}
   \pstree{\TR{father}}
     {\pstree{\TR{brother}}{\TR{nephew}}
      \pstree{\TR{Me}}
             {\pstree{\TR{son}}{\TR{grandson}}
     }
  }
}