Nai is typically Lombard, Pavese and Milanese, Gambolò, Vigevano and Garlasco in Pavia and Milan and Abbiategrasso in Milan, with presences also in the Alessandria area, Naj, extremely rare, it would seem from the Lombard area, Piedmontese should derive from the name medieval of Celtic origin Najus, in turn derived from the contraction of the term and Celtic name Nametos or Naumetos (ninth), probably attributed to the ninth son.
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