From Latin leo meaning 'lion'; used as a given name symbolizing courage and strength.
Lion stands apart from most given names in that it requires no etymological unpacking — it is the animal, bold and unambiguous, which is itself precisely its appeal. Yet the name has deep linguistic history: the word passed into English from Old French lion, from Latin leo, from Greek léon, and ultimately traces to a Semitic root shared with the Hebrew aryeh and Arabic asad, all meaning the great cat. This convergence across language families reflects how universally the lion has served as a symbol of courage, sovereignty, and divine protection.
In Jewish tradition, the lion is the symbol of the tribe of Judah, and Lion (or Leib in Yiddish, Aryeh in Hebrew) has long been a name in Ashkenazi communities — sometimes given as an explanatory translation of the Hebrew. In medieval Europe, rulers cultivated leonine imagery: Richard I of England was called Coeur de Lion, the Lionheart. The lion appears on heraldic crests, in the books of Revelation and Daniel, in Narnia as Aslan, and on the flags of nations from England to Ethiopia.
As a given name in English, Lion is rarer than the clearly related Leon or Leonardo, which gives it an uncompromising directness. It has appeared in German-speaking Jewish communities for generations (where Löw or Löwe served the same purpose) and has seen renewed interest globally among parents who want a name with mythic resonance but no elaborate spelling. It is, at its heart, a name that makes a statement without needing to explain itself.