There is no Fred Buuer in Harry Potter. You may be thinking of Fred Weasley, twin brother of George Wealsey and older brother to Ron. Fred Weasley dies in the end of the seventh book. He died at age 20 by an explosion caused by death eater, Augustus Rookwood while fighting alongside his older brother Percy inside the Hogwarts castle.
Fred Thomas - third baseman - died in 1986.
Fred Berry died on October 21, 2003 at the age of 52.
He did not die, he still lives.
He died from pneumonia.
Fred Stuhr died on October 26, 1997, in Pasadena, California, USA of automobile accident.
No, he did not die.
Fred and George do not both die only Fred dies.
Fred Hollow died on the 10 of February 1993, from cancer.
Fred Csasznik died in 1985.
Fred Earle died in 1915.
Fred Haggar died in 1913.
Fred Goebel died in 1964.
Fred Klaus died in 2005.
Fred Forbát died in 1972.
Fred Mendelsohn died in 2000.
Fred Nicholson died in 1972.
Fred Kirby died in 1996.