Miles Bletchley

From Hpwiki

Miles Bletchley is a student of Slytherin House at Hogwarts and, from Harry's first to fifth year, the Keeper on the Slytherin Quidditch team (unless the Bletchley in the first book was an older brother). Before the Slytherin-Gryffindor Quidditch match in Harry's fifth year, Bletchley hexed Alicia Spinnet in the library.

He is at least two years older than Harry.