From Japanese 映 (e) meaning "reflect, projection", 栄 (e) meaning "flourish, prosperity, honor, glory, splendor", 永 (e) meaning "eternity, long, lengthy", 榎 (e) meaning "Chinese hackberry", 慧 (e) meaning "wise" or 惠 (e) meaning "blessing, grace, favor, kindness" combined with 生 (na) meaning "life, genuine, birth" or 和 (na) meaning "harmony, peace, tranquility, Japan". Other kanji combinations are possible.
Of uncertain origin and meaning. Theories include a Scandinavian borrowing of Eithne, a feminine form of Enar and a short form of names ending in -ena.