Type Word Usage Old Slavic (Hypothetical) Scripts калъ(Church Slavic) Meaning & History Slavic word meaning "dirt, mud" [1][2]. Related ItemsDetails Surname DescendantsKaluža, Kalužová(Czech) Kałuża(Polish) Kaluža(Slovene) Sources & References Derksen, Rick. Etymological Dictionary of the Slavic Inherited Lexicon. Brill, 2008, page 220. Trubachyov, Oleg. Etimologicheskiy Slovar Slavyanskikh Yazykov (vol. 9). Moscow, 1974-, page 127.