\documentclass[a4]{jarticle}
  \usepackage{labels}
  \LabelCols=3                  % Number of columns of labels per page
  \LabelRows=7                  % Number of rows of labels per page
  \LeftBorder=8mm               % Space added to left border of each label
  \RightBorder=8mm              %  Space added to right border of each label
  \TopBorder=9mm                % Space to leave at top of sheet
  \begin{document}

  \begin{labels}
  \input names.dat
  \end{labels}

  \end{document}