Search gender: all male female トオ Japanese Girl Names Variations. 2 names found. gender: all male female Name: to Katakana: トオ 0 Kanji: 十 Meaning: 十Ten. Kanji character for the number 10 (ten). The next number after nine. A large number. A number of things. A shape in which lines intersect vertically and horizontally. Name: to Katakana: トオ 0 Kanji: とお Meaning: と お You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > トオ Japanese Girl Names Variations.