German short form of Elizabeth, from Hebrew 'Elisheva' meaning God is my oath.
Elsa began as a short form of Elisabeth, the Greek and Latin biblical name that ultimately goes back to the Hebrew Elisheva, usually interpreted as “my God is an oath” or “God is abundance.” In Germanic and Nordic languages, Elsa gradually stepped out from being merely a nickname and became a fully independent given name, prized for its crisp, bright sound. Long before modern animation, it already carried a distinctly storybook aura: medieval German legend gives us Elsa of Brabant, beloved of the knight Lohengrin, and Richard Wagner’s 1850 opera Lohengrin helped fix that romantic image in European culture.
Its cultural life has been unusually vivid for such a compact name. Elsa Schiaparelli, the daring Italian fashion designer, gave it avant-garde glamour; actress Elsa Lanchester lent it theatrical wit and eccentric charm. In the English-speaking world, the name had periods of steady but modest use, often read as elegant, continental, and slightly old-world.
Then Disney’s Frozen in 2013 transformed public perception almost overnight. Elsa suddenly became associated with icy power, independence, and sisterly devotion, and the name saw a sharp popularity surge in many countries. That modern association is now so strong that it sometimes eclipses its older roots, yet the name still holds both histories at once: a medieval European diminutive with biblical ancestry, and a contemporary cultural emblem of self-possession and magic.