Search gender: all male female コヨ Japanese Names Variations. 2 names found. gender: all male female Name: koyo Katakana: コヨ 0 Kanji: こよ Meaning: こ よ Name: koyo Katakana: コヨ 0 Kanji: 湖代 Meaning: 湖Lake. A place where water accumulates on land. 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. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > コヨ Japanese Names Variations.