YOU SAID:
hanna knows what hanna means
INTO JAPANESE
ハンナはハンナが何を意味するのか知っている
BACK INTO ENGLISH
Hannah knows what Hannah means
INTO JAPANESE
ハンナはハンナの意味を知っています
BACK INTO ENGLISH
Hannah knows the meaning of Hannah
INTO JAPANESE
HannahはHannahの意味を知っています
BACK INTO ENGLISH
Hannah knows the meaning of Hannah
That didn't even make that much sense in English.