Search gender: all male female Roizu Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: roizu Katakana: ロイズ 0 Kanji: 蕗泉 Meaning: 蕗Japanese butterbur (a kind of plant). 泉Spring. Water that gushes out of the ground, source. Source of water. Hot spring. The other world. The underworld. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Roizu Girl Name Meaning, Kanji Variations.