In all the world, Toyu (Toyu 
) is quite a common principally boy's, but scarcely female given name. The first name Toyu is habitual in Japan, where it is quite a rare principally male, but very infrequently female name, Albania, where it is a rare male name, and India, where it is an extremely rare unisex name. Very seldom, Toyu is the last name as well as the forename.
Abe, Yazaki, Shimada, Shimizu, Kikuchi, Hayashi, Woodson, Yoshida, Miyazaki, Murakami, Yamada, Kawamura, Nakamura, Nakayama, Nakagawa, Fujiwara, Ishikawa, Watanabe, Yamamoto, Matsumoto, Kobayashi, Kitahara, Oikawa, Hirata, Nakano, Ito, Ota, Sato, Seki, Arai, Asai, Kato, Toya, Endo, Ueda, Maeda, Saito, Asano, Inoue, Okada, Ohara, Suzuki, Koyama, Tanaka, Takada, Takeda, Takahashi, and Hashimoto