Harry Potter Wiki talk:ProblemReports/8370

The exact quote is: ''I don't believe it! I don't believe it! Oh, Ron, how wonderful! A prefect! That's everyone in the family!'' Excluding Fred and George who vocally wonder about their family status next, the implication is that everyone in the family who was eligible to be a Prefect did become one. This may include Molly and Arthur, but "everyone" also implies Charlie.