From Japanese 乃 (nai), a possessive particle, 夏 (na) meaning "summer", 夜 (nai, naito) meaning "night", 夢 (nai) meaning "dream", 奈 (na) meaning "apple tree", 星 (na) meaning "star", 那 (na), an interjection or 騎 (nai) meaning "equestrian, riding on horses", 生 (i) meaning "life, genuine, birth" or 依 (i) meaning "reliant, depend on, consequently, therefore, due to" combined with 斗 (to), which refers to a Chinese constellation, 愛 (ito) meaning "love, affection", 智 (to) meaning "wisdom, intellect, reason", 月 (to) meaning "moon", 翔 (to) meaning "soar, fly", 十 (to) meaning "ten" or 士 (to) meaning "gentleman, scholar, samurai". Other kanji or kanji combinations can form this name as well.
Usage of this name is, most likely, influenced by the word night.