Question: Erik Hivju's son played what role on "Game of Thrones"?

Context paragraphs:
Gorden Kelley: Gorden Bond Kelley (June 11, 1938 – October 22, 2015) was an American football linebacker in the National Football League for the San Francisco 49ers and the Washington Redskins.  He played college football at the University of Georgia.  He was married to Charlotte and had two children, son Gordon Jr. and daughter Mary.  The son played college football in Virginia.  After retirement, he worked in real estate as well as owning a furniture store in Ocean Ridge, Florida.

Ivan Henjak: Ivan Henjak (born 9 March 1963 in Republic of Croatia) is an Australian former professional rugby league footballer and coach.  A New South Wales Country representative half back, Henjak played his club football in the NSWRL premiership with the St. George Dragons, Canberra Raiders and Western Suburbs Magpies.  He later became head coach for the Brisbane Broncos of the National Rugby League, the second ever, having taken over from Wayne Bennett in 2009.  Henjak is also the uncle of Australia international rugby union player Matt Henjak, while Henjak's son played front row for Australian Schoolboys.

Montuno: Montuno has several meanings pertaining to Cuban music and its derivatives.  Literally, "montuno" means 'comes from the mountain', and so "son montuno" may refer to the older type of son played in the mountainous rural areas of Oriente.  Another possibility is that the word "Montuno" comes from the word "Montura" which is the Spanish word for "Saddle", because the rhythm in son music is like riding a horse.  Or it may mean the final section of a song-based composition; in this sense it is simply part of a piece of music.  Here it is usually a faster, brasher, semi-improvised instrumental section, sometimes with a repetitive vocal refrain.  Finally, the term "montuno" is also used for a piano "guajeo", the ostinato figure accompanying the montuno section, when it describes a repeated syncopated piano vamp, often with chromatic root movement.

Terry Jones (defensive tackle): Terry Wayne Jones (born November 8, 1956 in Sandersville, Georgia) is a former American football defensive tackle in the National Football League.  He played his entire career from 1978 to 1984 for the Green Bay Packers.  His son played tight end in the NFL for the Baltimore Ravens and the San Francisco 49ers

Harry Sellars: Harold Sellars (9 April 1902 – 30 December 1978) was an English footballer, who played in the Football League for Stoke City.  He made 395 appearances for Stoke in all competitions, and helped the club to win the Third Division North title in 1926–27 and the Second Division title in 1932–33.  His son John also played for Stoke in the 1950s.  Together, father and son played 808 league and cup games for the club.

Erik Hivju: Erik Hivju (born 24 September 1947) is a Norwegian actor.  Hivju has appeared in more than a dozen television series, as well as several films.  He is the father of the Norwegian actor Kristofer Hivju.

Jeff Christensen: Jeffrey Bruce Christensen (born January 8, 1960) is a former American football quarterback in the National Football League.  He played for the Cincinnati Bengals, Philadelphia Eagles and Cleveland Browns.  He played college football for the Eastern Illinois Panthers.  His son played college football at Iowa and Eastern Illinois.

1996: Pust på meg!: 1996: Pust på meg! , also known as simply Pust på meg, is a 1997 Norwegian drama film directed by Eva Dahr, Oddvar Einarson, Mona J. Hoel, Marius Holst and Eva Isaksen, and starring Krister Henriksson, Frits Helmuth, Stina Ekblad, Erik Hivju and Bjørn Sundquist.  Four different scenes are being played out in an apartment in Oslo one day in April 1996.

Kristofer Hivju: Kristofer Hivju (born December 7, 1978) is a Norwegian actor, producer, and writer.  He is best known for playing the role of Tormund Giantsbane in the HBO fantasy series "Game of Thrones".

You're Dead (film): You're Dead is a 1999 British dark comedy crime film directed by Andy Hurst.  Although set in London most of the film was in fact filmed in Germany, and the film was released in German dub as "You Are Dead", and in Japan as "King of UK".  The plot concerns a disastrously fatal bank robbery set up by a gangster's son played by Rhys Ifans, while the emotional centre of the film is built on the relationship between the accomplice in the robbery, a veteran safe-breaker played by John Hurt, and his policewoman daughter.

Supporting paragraphs: Erik Hivju Kristofer Hivju
Answer: Tormund Giantsbane