Surname Itiro (Itiro 
) , in all the world, is a very rare family name. The cognomen Itiro is habitual in Nigeria, where it is a very rare surname, Israel, and Brazil, where it is an extremely rare surname. More frequently, Itiro is the forename as well as the last name.
Oda, Fujita, Itikawa, Yamada, Shimada, Koikida, Takamoto, Tsunoda, Tsubota, Nakaoka, Nishida, Miyasaki, Muranaka, Shirakawa, Kawakami, Nakamura, Nakayama, Hasegawa, Watanabe, Matsumoto, Takahashi, Tsujimoto, Hatada, Naruto, Toyota, Tajima, Mori, Muto, Sato, Siio, Iida, Marui, Myose, Saito, Namba, Ikeda, Yoshiyasu, Ogawa, Sampei, Sakata, Shinmi, Sugano, Suzuki, Assano, Kaneko, Kotama, Takada, Takeda, Makino, and Katsurayama