know of
US /noʊ ʌv/
UK /noʊ ʌv/

1.
wissen von, kennen
to be aware of someone or something, often without having detailed knowledge
:
•
Do you know of any good restaurants nearby?
Kennen Sie gute Restaurants in der Nähe?
•
I only know of him by reputation, I've never met him.
Ich kenne ihn nur vom Hörensagen, ich habe ihn nie getroffen.