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]
(..) I don't know. That's right. Dad. Dad! Who... was that? He looked... familiar! Have I met him? No, honey, you haven't met him. Have you met him? No! Let's go get your mother. (..)1992 Twin Peaks: Fire Walk with Me