Question: Who is the father of the character Alfie Allen portrayed in "Game of Thrones"?

Context paragraphs:
Close to the Enemy: Close to the Enemy is a British period drama miniseries set in the late 1940s in London.  It is written and directed by Stephen Poliakoff, starring Jim Sturgess, Freddie Highmore, Charlotte Riley, Phoebe Fox, Alfred Molina, Lindsay Duncan, August Diehl, Alfie Allen, Angela Bassett, Antje Traue, Lily G and Robert Glenister.  It premiered in the United Kingdom on BBC Two on 10 November 2016.

Keith Allen (actor): Keith Howell Charles Allen (born 2 September 1953) is a Welsh actor, comedian, musician, singer-songwriter, artist, author, and television presenter.  He is the father of singer Lily Allen and actor Alfie Allen, and brother of actor and director Kevin Allen.

Alfie Atkins: Alfie Atkins (Swedish: "Alfons Åberg" ) is a fictional character created by the author Gunilla Bergström from Sweden in 1972.  Alfie Atkins appears in books and animated cartoons.  Alfie Atkins is a pretty ordinary guy, who lives with his father.  When he was younger he had an imaginary friend named Malcolm ("Mållgan" in Swedish; Moggie in English TV version), that only Alfie could see.  Later, he gets real friends such as "Milla" and Victor ("Viktor").  He also has a cat named Puzzle ("Pussel").

Plastic (film): Plastic is a British-American action comedy-crime film directed by Julian Gilbey and co-written by Will Gilbey and Chris Howard.  The film stars Ed Speleers, Will Poulter, Alfie Allen, Sebastian de Souza and Emma Rigby.

Shane Richie: Shane Patrick Roche, known as Shane Richie, (born 11 March 1964) is an English actor, comedian, television presenter and singer.  Following initial success as a stage and screen performer, he became best known for his portrayal of the character Alfie Moon in the BBC One soap opera "EastEnders" between 2002 and 2005 and then again from 2010 until 2016 and then in its spin-off RTÉ Drama "" from 2017 onwards.

John Wick: John Wick is a 2014 American neo-noir action thriller film directed by Chad Stahelski and David Leitch.  It stars Keanu Reeves, Michael Nyqvist, Alfie Allen, Adrianne Palicki, Bridget Moynahan, Dean Winters, Ian McShane, John Leguizamo and Willem Dafoe.  The first installment in the "John Wick" film series, the story focuses on John Wick (Reeves), a retired hitman seeking vengeance for the theft of his vintage car and the killing of his puppy, a gift from his recently deceased wife.  Stahelski and Leitch directed the film together, though Leitch was uncredited.

Gunilla Bergström: Gunilla Bergström (born 3 July 1942) is a Swedish author, journalist, and illustrator from Gothenburg.  She is best known for her series of children's books about the character Alfie Atkins (Swedish: "Alfons Åberg").

Alfie (Lily Allen song): "Alfie" is a song by British recording artist Lily Allen from her debut studio album, "Alright, Still" (2006).  Written by Allen and Greg Kurstin, the song was released as the fourth and final single from the album, on 5 March 2007, by Regal Recordings.  In the United Kingdom, it was marketed as a double A-side single, along with "Shame for You".  While the melody incorporates a sample of Sandie Shaw's "Puppet on a String", the lyrics directly describe Allen's real life younger brother, actor Alfie Allen, criticising him for his lazy behaviour.

Alfie Allen: Alfie Allen (born 12 September 1986) is an English actor.  He is best known for portraying Theon Greyjoy in the HBO series "Game of Thrones" since 2011.

Theon Greyjoy: 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 son and heir of Balon Greyjoy, taken as a ward by Lord Eddard Stark following Balon's failed rebellion.

Supporting paragraphs: Alfie Allen Theon Greyjoy
Answer: Balon Greyjoy