Theodor Johannes Krüper
Theobald Johannes Krüper, sometimes known as Theodor (1829–1921) was a German ornithologist and entomologist who worked mainly in the Balkans. He was a student at the University of Berlin and a friend of Otto Staudinger .
He was later the curator of the zoological collection of the natural history museum in Athens. He collected insects from 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.
- Hesselbart, G.; Oorschot, H. van & Wagener, S. 1995 Die Tagfalter der Türkei unter Berücksichtigung der angrenzenden Länder.- Bocholt, Selbstverlag S. Wagener.