Search gender: all male female Koshio Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: koshio Katakana: コシオ 0 Kanji: 越夫 Meaning: 越Over 夫Husband. A man who is married. An adult male. A full-fledged man. A respectable man. A man engaged in labor. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Koshio Boy Name Meaning, Kanji Variations.