put a name to (someone or something)
To recall the name of someone or something. Usually used in the negative. I know we went to high school together, but I can't put a name to him. There's some form you have to fill out in order to claim the benefit, but I can't put a name to it at the moment.
put a name to
know or manage to remember what someone or something is called.put a ˈname to somebody/something
know or remember what somebody/something is called: I recognize his face but I can’t put a name to it.