YOU SAID:

He said that the girl was indeed, the mother of him

INTO JAPANESE

彼は女の子は確かに、彼の母親だったと言いました

BACK INTO ENGLISH

He said the girl was his mother, indeed

INTO JAPANESE

彼は女の子が彼の母親だと言いました。

BACK INTO ENGLISH

He said the girl was his mother.

INTO JAPANESE

彼はその少女が彼の母親だと言った。

BACK INTO ENGLISH

He said the girl was his mother.