Search gender: all male female Koheki Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: koheki Katakana: コウヘキ 0 Kanji: 紘碧 Meaning: 紘Crown String 碧Blue. Green. Greenish-blue. A beautiful blue stone. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Koheki Name Meaning, Kanji Variations.