sentences:  Two Lake Malawi cichlids have been named after him, namely "Aulonocara koningsi" by Patrick Tawil in 2003, and "Placidochromis koningsi" by Hanssens in 2004.Late in her career famed ichthyologist Ethelwynn Trewavas mentored Konings, providing feedback and suggestions for his research.When her eyesight failed late in her life she asked him to accept her stereo microscope as a gift from the prominent African cichlid expert of the mid-20th century to the man who succeeded her in describing a multitude of new cichlid species.