\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}}
     }
   }
}