People should definitely create these for other families. Just sayin'.
You know you're probably a Wilkes when...1. The fact that he/she is your cousin/sister/uncle/etc. actually excites you
more.
2. You consider people who don't speak at least two languages barbaric commoners.
3. Your arranged marriage ends up far better than any relationship you could've constructed for yourself would have.
4. You're jealous that your sister got married before you...
5. ...because now you can't fantasize about a world where proposing would be okay.
6. Attempting to maim one of your siblings actually brings the two of you closer.
7. Your family only seems to like your spouse at the moments when you can't stand them.
8. You've actually considered writing thank-you letters to people who have eliminated your enemies.
9. You've gotten to the point where the letters are written, but by that time the person you wrote to has done something to piss you off and you're on your way to harm them painfully.
10. At least one of your siblings knows a horrible secret about you, but it's okay -- you know one about them, too.
11. Apologies consist, for the most part, of expensive presents and a willingness to forget the situation has happened.
12. Despite the fact that you are male, you can probably pick out the most stunning jewelery known to man.
13. You have an irrational fear of at least one animal (kittens, boa constrictors, etc...).
14. 'Bonding activities' usually involve oppressing the masses in one form or another.
15. Your parents actually sent your brothers (or you and your brother) to separate schools in hopes of avoiding a reputation for having 'those Wilkes boys'.
16. ...it didn't help.
17. Your best friend/lover/etc. is a borderline psychopath with an unhealthy fixation on a man more powerful than her.
18. Freckles make you feel itchy and poor (note: you may also be a Malfoy).
19. Your Christmas list has at least one name on it in red ink as secret reminder you're supposed to kill them at some point -- deck the halls with parts of bodies!
This list is liable to expand rapidly like an obese child eating chocolate cake.