Search gender: all male female 怪 Japanese Girl Names Variations. 1 names found. gender: all male female Name: keiko Katakana: ケイコ 0 Kanji: 怪子 Meaning: 怪Suspicious 子Children You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > 怪 Japanese Girl Names Variations.