Search gender: all male female ロイズ Japanese Girl Names 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 Japanese Names By Kanji > ロイズ Japanese Girl Names Variations.