Akiko (秋子 or 明子) combines aki (autumn, or bright) and ko (child) — "autumn child" or "bright child."
Princess Akiko of Mikasa (born 1981) is the great-granddaughter of Emperor Taishō. Akiko Yosano (1878-1942) was the iconic Japanese poet and feminist.
Akiko reduces to seven — the number of Japanese autumn.