Search gender: all male female ロッコウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: rokko Katakana: ロッコウ 0 Kanji: 六宏 Meaning: 六Six. Sixth. Kanji character for the number 6 (six). A number that is one more than five. 宏Large. Big. Expand. Excellent. To be splendid. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ロッコウ Japanese Boy Names Variations.