Search gender: all male female Onju Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: onju Katakana: オンジュ 0 Kanji: 音珠 Meaning: 音Sound. Tone. Voice. News. 珠Ball. A round ball that forms inside a shell. A small, round ball, like a pearl. A metaphor for something beautiful or magnificent. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Onju Girl Name Meaning, Kanji Variations.