YOU SAID:

this is aki he is my brother

INTO JAPANESE

これは彼が私の兄弟であるアキです

BACK INTO ENGLISH

This is Aki, for which he is my brother.

INTO JAPANESE

これは私の兄であるアキです。

BACK INTO ENGLISH

This is Aki, my brother.

INTO JAPANESE

この人は私の兄です。

BACK INTO ENGLISH

This is my brother.

INTO JAPANESE

この人は私の兄です。

BACK INTO ENGLISH

This is my brother.