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In the world, エツオ (エツオ ) is an extremely rare unknown gender given name. Much more prevalently, エツオ is the last name as well as the forename.
Etso, Etsuo, 悦生, 悦男, and 悦雄
カトウ, スズキ, トミタ, ヤマダ, ホズミ, and ワタナベ