Nagasawa Family History
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Nagasawa Name Meaning
Japanese: ‘long swamp’; though written with different characters today, it is of the same origin as Nakazawa, both being common place names. The surname is found mostly in central Japan. One family of Minamoto origin came from Nagasawa-zato in Etchu (now Toyama prefecture).
Source: Dictionary of American Family Names ©2013, Oxford University Press