Following is the Weasley Family Tree showing all the important family members of the Weasley Family that were a part of the Harry Potter movie franchise. As illustrated here, Arthur Weasley's parents are Septimus Weasley and Cedrela Black. Arthur, in turn, married Molly Prewett, who came from the Prewett family. Together, they have seven children. As per the Weasley Family Tree, the seven Weasley family members shown in the Harry Potter movies are Fred, George, Ron, Charlie, Molly, Arthur, Ginny, Bill, and Percy. According to the Family Tree diagram, Ronald Bilius Weasley is the youngest of the six Weasley boys and the second youngest child of Arthur and Molly Weasley.