Search gender: all male female Royuko Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: royuko Katakana: ロユコ 0 Kanji: 蕗由子 Meaning: 蕗Japanese butterbur (a kind of plant). 由Source. Origin. to be based on. Reason. 子Children You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Royuko Girl Name Meaning, Kanji Variations.