Search gender: all male female Isui Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: isui Katakana: イスイ 0 Kanji: 五翠 Meaning: 五Five, The fifth. Kanji to represent the number 5 (five). One more number than four. 翠Kingfisher (bird's name). Jade. Green. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Isui Boy Name Meaning, Kanji Variations.