Nothing. Its just a name
Edit:
The "Nami" in Namine means "wave". Though I don't know what the "ne" means.
Also, I know you only asked what Namine's name meant but assuming that you asked the question because of Kingdom Hearts I'll go ahead and tell you some other meanings.
sora: sky
Riku: land
Kairi: "Kai" is spelt with the kanji for "sea". Nomura never explained what "ri" was spellede with but it is commonly spelled with the kanji for "village".
-Animeramen
Edit:
The name Namine from Kingdom Hearts means "ocean wave" while Kairi's name means "wave" they did it to also add a name connection between them. Sora's means sky and Riku means earth/land.
-Namine_320
In English Brittany Anne Snow In Japanese Iku Nakahara -Violet
Namine makes Sora her protector
Roxas should be with Namine. Because Roxas is Sora's Nobody and Namine is Kairi's Nobody, because Sora and Kairi's hearts of connected the sort of connects Roxas and Namine.
Namine isn't like most nobodies because she is born with the body and soul of Kairi, but with the heart of Sora. This is why she has control over his memories. I suppose that Namine wasn't given an anagrammed name becauses she is 'born' of two different people, and not just one.Note:Namine's name comes from the Japanese Nami which means 'Ocean Wave'.
Namine's powers......well let's see Namine has the power to make new false memories and bring memories, that are lost back.
It was never revealed how Namine got her name in the game, or what character named her for that matter. All we know is that Namine's name is derived from the Japanese Nami which means 'Ocean Wave'. The fictional reason for her name has never been stated in the series, but we might find out in future installments.
Namine was never born, she is a Nobody, hence she was created by magical means and has no birth to speak of.
Namine
No he does not.
Namine could control the memories of anyone inside Castle Oblivion.
Namine is Kairi's Nobody. She was created when Kairi's heart went into Sora in the beginning.
Ritsu Namine is a boy, even though people think he is a girl, he is a cross-dresser that makes hime look like a girl. get a full picture of him you know what i am talking about!. Just type in ritsu namine in the google search bar and you see something called UTAHwiki. Click on that and it should give you this whole chart about her... I mean him!