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Surname セイタロウ (セイタロウ ) , across the world, is quite a rare family name. The cognomen セイタロウ is habitual in Eastern Asia, particularly Japan, where it is quite a rare surname.
Seitarou
イシイ, サカイ, スズキ, ヤマダ, ヨシダ, イシバシ, タカハシ, コバヤシ, スガワラ, マツオカ, ヨシヤス, ヨシイエ, and ワタナベ