Search gender: all male female ナナロウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: nanaro Katakana: ナナロウ 0 Kanji: 七郎 Meaning: 七Seven. Seventh. Kanji character for the number 7 (seven). 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 Japanese Names By Kanji > ナナロウ Japanese Boy Names Variations.