Search gender: all male female Yotsuo Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: yotsuo Katakana: ヨツオ 0 Kanji: 四男 Meaning: 四Four. The fourth. Kanji character for the number 4 (four). The next number after three. The pronunciation of "shi" is associated with the word "death," so it is often changed to "yo" or "yon. 男Male. Adult male. Son. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Yotsuo Name Meaning, Kanji Variations.