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Globally, Masuo (Masuo , ماسو ) is a rare epicene forename. The forename Masuo is characteristic of Syria, where it is a rare feminine name, Egypt, where it is a very rare masculine name, and the United States, where it is an extremely rare boy's name. Measured by absolute frequency, it is commonest in Egypt, Syria, and China. Much less frequently, Masuo is the last name as well as the forename.
Abe, Harada, Fukuda, Fujita, Ishida, Yamada, Shimizu, Shibata, Hayashi, Yoshida, Murakami, Sakamoto, Nakamura, Nakajima, Watanabe, Yamamoto, Yamazaki, Matsumoto, Kobayashi, Taniguchi, Takahashi, Hashimoto, Nakano, Tamura, Tanaka, Kimura, Ida, Ito, Ono, Ota, Mori, Sato, Kato, Goto, Ueda, Maeda, Yamashita, Saito, Kondo, Inoue, Ikeda, Okada, Ogawa, Masuda, Morita, Sasaki, Suzuki, Kaneko, Sakai, and Yamaguchi