Search gender: all male female Zeku Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: zeku Katakana: ゼクウ 4 Kanji: 是空 Meaning: 是Correct 空Sky. Atmosphere. Heaven. Big. Wide. Empty. No substance. Meaningless. Useless. In Buddhism, something without substance or essence. A thing related to aviation. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Zeku Boy Name Meaning, Kanji Variations.