As with many Japanese names, Keiko can be written using a number of different kanji. Some of the most common ways of writing Keiko (and the most representative meanings of the respective kanji) are:
恵子 — "lucky/blessed child"敬子 — "respectful child"景子 — "sunlight/view/scenic child"桂子 — "katsura tree child"圭子 — "square jewel child"慶子 — "happy child"啓子 — "open (one's eyes)/express/spring (season) child"硅子 — "silicon child"The suffix ko (子) implies the name is female and the name is almost never given to males. Much less commonly, Keiko can also be written as 螢子, 輕子, or 軽子.
Keiko Agena, an American actressKeiko Chiba (千葉 景子), a politician and former justice minister of JapanKeiko Fukuda (福田 敬子, 1913-2013), a Japanese-born American martial artistKeiko Fuji (藤 圭子, 1951-2013), a Japanese enka singer, actress, and mother of Hikaru UtadaKeiko Fujimori (藤森 恵子), a Peruvian congresswoman and former first ladyKeiko Han (潘 恵子), a Japanese voice actress and western astrologerMazie Keiko Hirono (広野 慶子), an American politician and the junior United States Senator from HawaiiKeiko Ihara (井原 慶子), a Japanese race car driverKeiko Kitagawa (北川 景子), a Japanese model/actressKeiko Kubota (窪田啓子), a Japanese singer and a member of the J-pop groups FictionJunction and Kalafina.Keiko Masuda (増田恵子), member of the J-pop duo Pink LadyKeiko Matsui (松居慶子), an internationally renowned Japanese pianist/composerKeiko Miura (三浦恵子), a Japanese field hockey athleteKeiko Nakazawa (中沢慶子), a Japanese former adult video and pink film actressKeiko Nobumoto, (信本敬中) a Japanese screenwriter the creator of Wolf's RainKeiko Takemiya (竹宮 惠子), a Japanese manga artistKeiko Takeshita (竹下景子), a Japanese actressKeiko Toda (戸田 恵子), a Japanese actressKeiko Utoku (宇徳敬子), a Japanese singer/songwriterKeiko Yamada (山田 桂子), a Japanese singer and lead vocalist of the J-pop band GlobeKeiko Yamada (manga artist) (山田 圭子), a Japanese manga artistKeiko Kubota (窪田啓子), a Japanese singerKeikō (景行), with a long "o," is the name given to Emperor Keikō posthumously.
Keiko Arahida, a recurring character played by Yūko Takeuchi in the 2009 TV series FlashForwardKeiko Katou, a fictional character from Strike WitchesKeiko O'Brien, a character from Star Trek: The Next Generation and Star Trek: Deep Space NineKeiko Onuki, a character in the novel and film Battle RoyaleKeiko Makino, a character from the manga The Kurosagi Corpse Delivery Service.Keiko Yukimura, a character from the manga seriesYuYu HakushoKeiko Nekton, a character from the graphic novel The Deep: Here Be Dragons and the following TV series The Deep.Keiko Tanaka a character from What's New Scooby Doo, episode Big Appetite in Little TokyoKeiko Ayano (Silica), a character in Sword Art OnlineKeiko (orca), the orca, or killer whale, which performed in the film Free Willy