Meanings by Kanji
In Japanese, there is a culture of Kanji which is a set of characters originated from Chinese characters, and the meaning of the name changes according to the choice of Kanji characters.
The greater the number of kanji variations, the more common name is in Japan. On the other hand, a name with few variations of kanji is unique and not very familiar to Japanese people.
For Nemu, Kanji choices are listed below, sorted by total number of good.
寧夢～ Nemu ～
然夢～ Nemu ～
眠夢～ Nemu ～