Family name Seikei (Seikei 
) , around the globe, is a rare cognomen. The last name Seikei is characteristic of Eastern Asia, particularly Japan, where it is a rare surname, and China, where it is an extremely rare surname. Much more frequently, Seikei is the forename as well as the last name.
Kin, Tanaka, Nomura, Hirado, Hibino, Fukuda, Ishida, Onishi, Hayashi, Onigashira, Yonekura, Yoshida, Yokokawa, Nakamura, Hasegawa, Fujimoto, Fujiwara, Watanabe, Yamanaka, Matsuyama, Kanashiro, Kobayashi, Kimura, Kodama, Kaneda, Kaneko, Uno, Sato, Chow, Kubo, Endo, Itoh, Miura, Saito, Araki, Kondo, Nishihara, Koike, Tamai, Tsuji, Nanbu, Okada, Otake, Ogata, Morita, Miyake, Sadwal, Suzuki, Jochi, and Yamashita