Search gender: all male female Seimo Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: seimo Katakana: セイモウ 0 Kanji: 盛毛 Meaning: 盛Prosperity. flourish. To be vigorous. To pile up high. To put in a vessel. 毛Hair You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Seimo Boy Name Meaning, Kanji Variations.