French name. In French, the name Theon means-untamed.The name Theon originated as an French name. The name Theon is most often used as a boy name or male name.French Name Meaning-untamed. Origin-France.rench name. In French, the name Theon means-untamed.The name Theon originated as an French name. The name Theon is most often used as a boy name or male name. French Name Meaning-untamed.