• Eroteum Blanco, 1837 accepted as Trichospermum Blume, 1825 [Family: Malvaceae]
• Eroteum O. Swartz, 1788 (unaccepted) [Family: Theaceae]
• Proetus Steininger, 1831 †
• Proreus Burr, 1907
• Protarum Engler, 1901
• Protea Linnaeus, 1753 accepted as Leucadendron R. Brown, 1810
• Protea Linnaeus, 1771
• Protelus Förster, 1862 (uncertain)
• Proterus Raffray, 1897
• Proteus Dujardin, 1835 accepted as Monocystis Stein, 1848 [Family: Monocystidae]
• Proteus Hauser, 1885 (Approved Lists, 1980) [Family: Morganellaceae]
• Proteus Laurenti, 1768 [Family: Proteidae]
• Proteus Müller, 1786 accepted as Amoeba Bory de St. Vincent, 1822 [Family: Amoebidae]
• Protium N.L. Burman, 1768
• Protus Simon, 1879