YOU SAID:
I once kissed my great great grand baby
INTO JAPANESE
私はかつて私の偉大な偉大な孫にキスをしました
BACK INTO ENGLISH
I once kissed my great great grandson
INTO JAPANESE
私はかつて私の曾孫にキスをしました
BACK INTO ENGLISH
I once kissed my great-grandson
INTO JAPANESE
私はかつて曾孫にキスをしました
BACK INTO ENGLISH
I once kissed my great-grandson
That didn't even make that much sense in English.