We see several students who attended Hogwarts during Harry's time having their pets/familiars described in 7 Harry Potter books (Hermione's Kneazle, Ron's Homo Animagus Ratus, Harry's owl, Neville's toad, Ginny's pygmy puff).
However, a great deal of named students aren't mentioned as owning a pet in the 7 main books.
Did JKR add to the known pets set in ancillary canon materials? (3 extra books, interviews, her web site, or Pottermore).
I'm only interested in pets of named characters who were students in Hogwarts in Harry's time in school (in any grade), not generic "some 2d year's giant sloth".