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Léna is a Hungarian and French short form of Helena, itself derived from the ancient Greek name Helénē, whose root is debated but most commonly linked to the Greek word for torch or light, or alternatively connected to Helenē meaning the Greek people. The name gained wide use across Europe through the legend of Helen of Troy and later through the veneration of Saint Helena, mother of the Roman emperor Constantine the Great. Léna functions as an independent given name in Hungarian-speaking regions as well as a familiar form in French, while related forms include Lena, Elena, Eleni, and Helen.