Quick answer
Neptune is a boy name meaning "wet, damp, clouds".
Pronunciation: English /ˈnɛp.tuːn/; English /ˈnɛp.tjuːn/.
Meaning and history
This name comes from the Latin Neptunus, which is of unknown meaning, possibly related to the Indo-European root * nebh- "wet, damp, clouds". Neptune was the god of the sea in Roman mythology, approximately equivalent to the Greek god Poseidon. This is also the name of the eighth planet in the solar system.
Notes and context
Usage: roman mythology