Theodor Johannes Krüper

Theobald Johannes Krüper, sometimes Theodor (1829–1917) was a German ornithologist and entomologist who worked mainly in the Balkans. He was from his days as a student at the University of Berlin a friend of Otto Staudinger .
He was later curator of the zoological collection of the natural history museum in Athens.He collected insects on Turkey, Greece and Bulgaria for the collections in Athens. He also sold collections to the dealerships "Otto Staudinger - Andreas Bang-Haas" and Wilhelm Schlüter from which they were sold on to several institutions including Museum für Naturkunde in Berlin and the now Slovak National Museum in Bratislava.
Krüper's nuthatch (Sitta krueperi) was named for him by August von Pelzeln.
The millipede genus Krueperia Verhoeff, 1900 was named for him by Karl Wilhelm Verhoeff