Search gender: all male female Niroku Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: niroku Katakana: ニロク 0 Kanji: 二六 Meaning: 二Two, The second. Kanji character for the number 2 (two).The next. Again. Another. Different. 六Six. Sixth. Kanji character for the number 6 (six). A number that is one more than five. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Niroku Boy Name Meaning, Kanji Variations.