Jorden Jury

Jordan Jury is a popular boy in the grade above Greg who only appears in The Ugly Truth and always has blowout parties. At one point, he invited Greg and Rowley to one of his parties, but Greg could not go because of his Uncle Gary's 4th wedding. The real reason he invited the kids in Greg's grade is to use them as servants, so Greg is somewhat glad he didn't go when he finds this out.
It is hinted that Jordan is still at Greg's middle school, meaning that it also has a ninth grade since Greg is in seventh or eighth grade, but it is still possible that Jordan is in a high school next to the middle school or he got held back a lot.