\usepackage {pstricks,pst-node,pst-tree}
\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}}
    }
  }
}