Statistically speaking it’s probably true. The fact that you’re friends with them is evidence that they have friends.
See “friendship paradox”: https://en.m.wikipedia.org/wiki/Friendship_paradox
See “friendship paradox”: https://en.m.wikipedia.org/wiki/Friendship_paradox
It depends if "you" refers to a specific person, which it seems to do in context.
And by definition, the ones with fewer friends also are known by fewer people.