Search gender: all male female Yoneichiro Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: yoneichiro Katakana: ヨネイチロウ 0 Kanji: 米一郎 Meaning: 米Rice 一One. The first. Kanji for the number 1 (one). To be the most superior. To begin, to put things together. 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 > Yoneichiro Boy Name Meaning, Kanji Variations.