Quick answer
Mayu is a girl name.
Meaning and history
From Japanese 真 ( ma ) meaning "real, genuine" or 満 ( ma ) meaning "full" combined with 優 ( yu ) meaning "excellence, superiority, gentleness" or 夕 ( yu ) meaning "evening". This name can also be constructed from other kanji combinations.
Notes and context
Usage: japanese | Japanese Hiragana: まゆ; Japanese Katakana: マユ