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Last name origins & meanings:

  1. Italian (Sicily): see Amaro.
  2. Arabic: variant of Amar.
  3. Japanese: ‘surplus’, usually written with characters used phonetically. It appears to be a shortening of amaribe ‘surplus doors’, a reference to the practice among census takers from ancient times up to the era of the Tokugawa shogunate (1603–1867) of listing households in groups of fifty; any households exceeding this number or a multiple of it were referred to as ‘surplus’. The surname is found chiefly in northeastern Japan.