Surname Eiwa (Eiwa 
) , in the world, is a rare cognomen. The family name Eiwa is habitual in Taiwan, where it is a rare surname, Japan, and Chile, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Japan, Taiwan, and Nigeria. Predominantly, Eiwa is the forename as well as the last name.
Ida, Yamada, Shimizu, Shibata, Hayashi, Higashi, Okamoto, Yoshida, Miyamoto, Sakamoto, Katayama, Kawamura, Takeuchi, Nakamura, Nakagawa, Nakajima, Watanabe, Yamamoto, Yamazaki, Matsumoto, Kobayashi, Takahashi, Fujita, Harada, Nakano, Tanaka, Ito, Ono, Mori, Sato, Arai, Aoki, Kato, Kono, Hori, Imai, Hashimoto, Ueda, Saito, Sakai, Kondo, Tsuji, Inoue, Matsuo, Matsui, Sasaki, Suzuki, Kimura, Miura, and Yamaguchi