- Robert Lowe -- Robert Lucas Pearsall
- Robert Luis -- Robert M
- Robert M. -- Robert MacDonald
- Robert MacGregor -- Robert Mandan
- Robert Mandel -- Robert Manos
- Robert Mansell -- Robert Marsanyi
- Robert Marselje -- Robert Massaro
- Robert Matarazzo -- Robert Maxwell His Harp & Orchestra
- Robert Mayer -- Robert McCollum
- Robert McCoy -- Robert McGinnis
- Robert McKay -- Robert Merdzo
- Robert Merrill -- Robert Michaels
- Robert Michelet -- Robert Mirabel
- Robert Miranda -- Robert Monediere
- Robert Montano -- Robert Moran
- Robert Morey -- Robert Muczynski
- Robert Mugalian -- Robert Napoleon
- Robert Nash -- Robert Nich Cotoia
- Robert Nichols -- Robert Nix
- Robert Noll -- Robert O.
- Robert O' Connor -- Robert Ousley
- Robert Overman -- Robert Page
- Robert Paige -- Robert Parker