If by full-blooded you mean pure-blood, all of Ron Weasley's brothers are pure-blood. He has five brothers; Charlie, Bill, Percy, Fred and George.
Fred Weasley died in Harry Potter and the Deathly Hallows.
Hagrid full blooded giant brother, Grawp.
harry potter doesn't have a brother, but he does have a cousin named Dudley.
James Potter and Lily (Evans) Potte
It is a cat, not an owl: Crookshanks
Sirius is more of a friend of Harry's. He was best friend to Harry's deceased father, James. James made Sirius Harrys' godfather.
Ron Weasley's sister is called Ginny Weasley.
Ronald Bilius Weasley
Cho Chang, Ginny Weasley and Hermione Granger.
Hermione doesn't have any brothers, Ron has five: Bill, Charlie, Percy, Fred, George. What 'full bloded' is, by the way?
Harry Potter was a wizard
No she does not. She is only a good friend of Harry, Ron, Hermione, Ginny, and Neville. Harry and Ginny named their daughter Lily Luna, since she is such a close friend to the Potters.
Sirius' brother, Regulus Black.
Hermione Granger is probably his cleverest friend. She is a 'mudblood' a witch born of a muggle family. Her ability to work out problems was a big help to Harry throughout the many adventures.