YOU SAID:

He who must not be named.

INTO JAPANESE

彼は名前が必要ではないです。

BACK INTO ENGLISH

He needs to name is not.

INTO JAPANESE

彼に名前を付ける必要はありません。

BACK INTO ENGLISH

You do not need to name him.

INTO JAPANESE

彼の名前にする必要はありません。

BACK INTO ENGLISH

You do not need to name him.