Keiko is a very popular female Japanese given name. Possible meanings 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: 子 — "lucky/blessed child" 子 — "respectful child" 子 — "sunlight/view/scenic child" 子 — "katsura tree child" 子 — "square jewel child" 子 — "hap… (More on Keiko)