[AngelicaDeAlquezar]

"Sonarle algo a alguien" means that something is familiar to someone.

- Me suena el nombre, pero no recuerdo de dónde lo conozco.
The name rings a bell, but I don't remember where I met him.

- Nos sonaba tu cara.
We'd seen your face somewhere before.

- No me suena ese actor, ¿cómo se llama?
I'm not familiar with that actor, ¿what's his name?

- ¿Dices que no te suena esta foto? ¡Pero si es famosísima!
So the photo doesn't ring a bell with you? But it's so well known!