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Cognomen ナオカ (ナオカ ) , around the world, is quite a rare surname. The family name ナオカ is characteristic of Eastern Asia, particularly Japan, where it is quite a rare surname.
Naoka, 尚佳, 尚香, and 直加
ウノ, カネコ, タムラ, ナカダ, オカモト, クロカワ, マルハシ, ヤマグチ, オガサワラ, ナカムラ, ヨシムラ, and ワタナベ