Search gender: all male female Onzaburo Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: onzaburo Katakana: オンザブロウ 0 Kanji: 恩三郎 Meaning: 恩Debt of gratitude 三Three. The third. Kanji to represent the number 3 (three).Again. Again and again. Many times. 郎Male. Men. Young men. A word that refers broadly to boys. A retainer. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Onzaburo Name Meaning, Kanji Variations.