Yukio
[juˈki.oʊ]Meaning
from japanese 幸 (yuki) "happiness" with 雄 (o) "hero, manly" or 男 (o) "male"
Background Story
Yukio is a masculine Japanese given name, borrowed into English and Portuguese from Japanese ゆきお. Behind the Name derives it from 幸 (yuki), meaning "happiness", combined with 雄 (o), meaning "hero, manly", or 男 (o), meaning "male, man". Other kanji combinations can also form the name, and it is commonly used as a feminine given name in works of fiction.

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