I usually get hit by the reverse.
I came up with the name "Theon" by myself in like 1991, and it had basically become my default fantasy character name. So it was with rising horror that I read A Game of Thrones in about 2000 or so, then sequels, and realized this guy was 100% going to ruin the name Theon forever.
More recently I came up with Agadir as a name for a major NPC villain, then like 3 days before the session he was in, Morocco launched a big "Visit Agadir!" campaign on the tube here, so my players found this hilarious.