• Kengia J.G. Packer, 1960
• Kepongia Southcott, 1993 (uncertain)
• Koenigia Linnaeus, 1767 [Family: Polygonaceae]
• Koenigia Pomel, 1883 (uncertain) [Family: Echinodermata (awaiting allocation)]
• Koenigia Salter, 1865 † (uncertain) [Family: Trilobita (awaiting allocation)]
• Koenigia T.E. von Post & C.E.O. Kuntze accepted as Lobularia Desvaux, 1815 [Family: Brassicaceae]
• Koigia Modzalevskaya, 1985 †