know of
US /noʊ ʌv/
UK /noʊ ʌv/

1.
saber de, conocer de
to be aware of someone or something, often without having detailed knowledge
:
•
Do you know of any good restaurants nearby?
¿Conoces algún buen restaurante cerca?
•
I only know of him by reputation, I've never met him.
Solo lo conozco de oídas, nunca lo he conocido.