Ron's Middle Name

[Alina]

No: HPFGUIDX 104111

I keep on seeing posts on the Bubble Gum Wrappers Anagram thread asking if
Ron's middle name begins with a B, even though several people replied that
yes, it's Bilius. So here it is once and for all. Here's a copy/paste of the
transcript of the chat where JKR revealed it:

J.K. Rowling's World Book Day Chat: March 4, 2004

kylie: Thanks for writing such wonderful books, Ms Rowling :). Just one
question: What are Ron, Hermione and Ginny's middle names? Thank you :)
JK Rowling replies -> My pleasure:) Middle names: Ginny is Molly, of course,
Hermione 'Jane' and Ron, poor boy, is Bilius.