Search gender: all male female Uin Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: uin Katakana: ウイン 0 Kanji: 雨音 Meaning: 雨Rain. Something that pours down like rain. 音Sound. Tone. Voice. News. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Uin Boy Name Meaning, Kanji Variations.