Quick answer
Akio is a boy name.
Meaning and history
From Japanese 昭 ( aki ) meaning "bright, luminous" combined with 夫 ( o ) meaning "man, husband", 男 ( o ) meaning "male, man" or 雄 ( o ) meaning "hero, manly". Other kanji combinations are also possible.
Notes and context
Usage: japanese | Japanese Hiragana: あきお; Japanese Katakana: アキオ