Save Gender Masculine Usage Japanese Scripts 美樹夫, 幹夫, 幹雄, 幹郎, 幹男, etc.(Japanese Kanji) みきお(Japanese Hiragana) Pronounced Pron. /mʲi.kʲi.o̞/ [key·simplify] Meaning & History From Japanese 幹 (miki) meaning "tree trunk" combined with 夫 (o) meaning "husband, man", 雄 (o) meaning "hero, manly", 郎 (o) meaning "son" or 男 (o) meaning "male, man". Other kanji combinations can form this name as well.