content: '''Theon Greyjoy''' is a fictional character in the ''A Song of Ice and Fire'' series of fantasy novels by American author George R. R. Martin, and its television adaptation ''Game of Thrones''. Theon is the youngest son and presumptive heir of Balon Greyjoy, taken as a ward by Lord Eddard Stark following Balon's failed rebellion. Theon's complex and often troubled relationship with both his birth and adoptive family are central to the character's arc throughout the novels and its television adaptation.
  Introduced in 1996's ''A Game of Thrones'', Theon subsequently appeared in ''A Clash of Kings'' (1998) and ''A Dance with Dragons'' (2011), after a 13-year gap in which he is reintroduced as '''Reek''', the tortured vassal of Ramsay Bolton. He is one of the major third person points-of-view through which Martin narrates both books.
  Theon is portrayed by English actor Alfie Allen in the HBO television adaptation.