Not just your fandoms, but your social circles if you were around back then. I didn't start doing Yuletide until year three or four, but I recognize most of the list, even though I only ever shared fandoms with a fraction of them, just from being friends with a couple of the people on there and talking in the comments of their LJs about general fandom meta or non-fandom things with people.

(Hell, I'm namespace Facebook friends with at least two of them. Fandom-adjacent conversations were how I met most of my post-college real-life friends.)