Quick definitions from WordNet (beau)

▸ noun:  a man who is the lover of a girl or young woman
▸ noun:  a man who is much concerned with his dress and appearance
▸ name:  A male given name (rare: 1 in 11111 males; popularity rank in the U.S.: #712)
▸ name:  A surname (very rare: popularity rank in the U.S.: #88026)

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▸ Also see beau