Neptune Family History
Neptune Name Meaning
English and West Indian (mainly Haiti): from an English and French variant of the name of the Roman god of freshwater and the sea Latin Neptunus. As the English surname it might be applied as a nickname but in Haiti and elsewhere in the West Indies it originates at least in part from the personal name Neptune of the same origin. This surname is also found among Native Americans namely the Passamaquoddies in ME.
Source: Dictionary of American Family Names 2nd edition, 2022