Johann Georg Haag-Rutenberg

Johann Georg Haag-Rutenberg (10 October 1830 Frankfurt am Main – 20 November 1879 Frankfurt am Main) was a German entomologist, lawyer and farmer, who was also an authority on the Coleoptera. In zoological names he is mentioned as an author under the name "Haag".

Haag suffered from eye, ear and possible neurological problems and shot himself with a gun.

His Coleoptera collections are kept at the following places - Melolonthidae 1878 via G. Metzler 1880 at Dt. Ent. Inst. Berlin Tenebrionidae and various Heteromera ex parte 1880 via Clemens Müller 1903 at Zool. Staatsslg. München Erotylidae and Languridae 1880 via E. Fleutiaux at Neervoort van de Poll Coccinellidae, Chrysomelidae, Cetoniidae and duplicate Heteromera 1880 via G. Kraatz 1909 at Dt. Ent. Inst. Berlin Buprestidae 1880 at F. Baden, 1934 via A. Théry at Mus. Nation. Hist. Nat. Paris Meloidae 1880 at Mus. Hist. Nat. Belg. Brüssel Cerambycidae at Witte/Breslau Tenebrionidae ex parte at Mus. civ. St. nat. Genova