He could not bring himself to give her his true name.

What do I care whether she has given me her true name or not!

To know the true name of a thing is to have power over it.

To know something's true name is to have power over it.

And there is power in being able to call something by its true name.

To tell the truth is to call something by its true name.

I knew it was not the true name of the man in the office.

And however did he know that it was the true name?

How else could he give you the white stone with your true name on it?

One of the above two, therefore, is our true name.