He looked 'familiar' [=he looked like someone I had seen before] but I couldn't remember his name.
Locals refer to the Maple Leaf restaurant 'familiarly' [='informally'] as ‘The Leaf.’
We are 'familiar with' the situation. [=we know about the situation]
(..) than by Barry! And then I got really freaked out, and that's when it hit me: how much Barry looks like Mr. Potato Head. Y'know, I mean, I always knew looked familiar, but... Anyway, I just had to get out of there, and I started wondering 'Why am I doing this, and who am I doing this for?' (..)1994 TvShow: Friends Title: The One Where Monica Gets a Roommate Season: 1 Episode 1