Save Gender Feminine Usage Japanese (Rare) Scripts 莉央子, 莉緒子, 理央子, 里桜子, 凜音子, etc.(Japanese Kanji) りおこ(Japanese Hiragana) リオコ(Japanese Katakana) Pronounced Pron. RYEE-O-KO [key·IPA] Meaning & History From Rio 2 combined with 子 (ko) meaning "child."This name is rarely used.