Rexton Bilius "Rex" Weasley (b.June 17th 2003) is the son of Ronald Weasley and Luna Lovegood.
Rex began attending Hogwarts in 2014 and was sorted in Gryffindor. He was made a prefect in his 5th year.
His Godparents are Harry Potter and Hermione Granger. He is bestfriends with their son, James Potter II.