Search gender: all male female Keidan Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: keidan Katakana: ケイダン 0 Kanji: 鯨男 Meaning: 鯨Whale (Cetacea spp.) 男Male. Adult male. Son. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Keidan Boy Name Meaning, Kanji Variations.