DeclevaDecleva is a surname of Croatian origin. Some variations of the spelling of this surname include Deklewa and Dekleva.Notable people Zoltán Decleva, Hungarian military officer Nikola Dekleva, Serbian surgeon Enrico Decleva Italian historian Milan Dekleva, Slovenian poet Cvetana Dekleva, Slovenian basketball player Sandrine Dixson-Declève, Belgian energy policy and climate change leader Vesna Dekleva, Slovenian sailor