Jonas Kilius, born in 1938 in the district of Kupiškis, died in Vilnius in 2012, was a German philologist - Dr. phil. in 1973 - and translator. He graduated from Vilnius University in 1962 and taught German eversince, as a head of the Faculty of German Language between 1978 and 1993.

In 1969 he edited the German-language anthology Lesebuch für Philologen with texts by August Schleicher, Friedrich Kurschat, Christian Bartsch, Viktor Jungfer, Edwin Geist, and Hermann Buddensieg. He was the chairman of the Lithuanian-German Society for many years, researched on German-Lithuanian relations and gave lectures at conferences in Germany on the situation in Lithuania.

His translations into Lithuanian include: Viktor Falkenhahn: Die Farnblüte, Erstkommunion des alten heidnischen Preußen (Pergalė Nr. 5, 1986), Vydūnas und sein Werk „700 Jahre deutsch-litauische Beziehungen“: Erinnerungen und Gedanken eines Deutschen (in Vydūnas: 700 Years of German-Lithuanian Relations, 2001) and Georg Forsters Briefe aus Vilnius (Letters from Vilnius, 1988).