Search gender: all male female コヨコ Japanese Girl Names Variations. 1 names found. gender: all male female Name: koyoko Katakana: コヨコ 0 Kanji: 古代子 Meaning: 古Old 代To replace. To substitute. Take turns. To take the place of. One who replaces. Age. A person's life. Continuing from generation to generation. A long time. Money paid for goods or labor. 子Children You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > コヨコ Japanese Girl Names Variations.