Question: Who was Bruce Irons brother?

Context paragraphs:
Grant Irons: Grant Michael Irons (born July 7, 1979) is a former American football defensive end.  He played in 43 career games for the University of Notre Dame, making 26 starts at numerous positions on defense.  He started playing for the Buffalo Bills in 2002.  His father Gerald Irons also played for the Raiders.  He is the cousin of Paul Irons, cousin once removed of Kenny Irons and David Irons and the brother of Jarrett Irons.

Andy Irons: Philip Andrew Irons (July 24, 1978November 2, 2010) was an American professional surfer.  Irons learned to surf on the dangerous and shallow reefs of the North Shore in Kauai, Hawaii.  Over the course of his professional career, he won three world titles (2002, 2003, 2004), three Quiksilver Pro France titles (2003, 2004, 2005), two Rip Curl Pro Search titles (2006 and 2007) and 20 elite tour victories including the Vans Triple Crown of Surfing four times from 2002-2006.  On September 3, 2010 he won the Billabong Pro Teahupoo in Tahiti.  He and his family hosted the Annual Irons Brothers Pinetrees Classic, a contest for youngsters.  The Governor of Hawaii declared February 13 forever "Andy Irons Day".  He is the only surfer to have won a title at every venue on the ASP calendar.

Bruce Irons (engineer): Bruce Irons (1924 – 5 December 1983) was an engineer and mathematician, known for his fundamental contribution to the finite element method, including the patch test, the frontal solver and, along with Ian C. Taig, the isoparametric element concept.

Momentum (2001 film): Momentum Under the Influence is a surf movie distributed by Steelhouse Distribution and produced by Poor Specimen.  It features all the best surfers in the world under 23 that surf places like Mentawai Islands, Australia, South Africa, France, Timor Island, Indonesia, Mexico, Hawaii and California.  Surfers include CJ Hobgood, Damien Hobgood, Paul Roach Dan Malloy, David Rastovich, Mick Fanning, Taj Burrow, Joel Parkinson, Ben Bourgois, Bruce Irons, Andy Irons, and Dean Morrison.

Alexander Livingstone Bruce: Alexander Livingstone Bruce (24 October 1881 – 12 February 1954) was a capitalist of Scottish origin, a director and major shareholder of A L Bruce Estates Ltd, one of the largest property owning companies in colonial Nyasaland.  His father, Alexander Low Bruce, was a son-in-law of David Livingstone and urged his two sons to use the landholding he had acquired for philanthropic purposes.  However, during almost 50 years residence in Africa, Bruce represented the interests of European landowners and opposed the political, educational and social advancement of Africans.  After the death of his elder brother in 1915, Alexander Livingstone Bruce had sole control of the company estates: his management was harsh and exploitative, and one of the main causes of the uprising of John Chilembwe in 1915.  During the uprising, three of Bruce’s European employees were killed and one of them, William Jervis Livingstone was held partly to blame for the revolt.  Although Livingstone was carrying out Bruce’s orders, Bruce, as a leading landowner and member of the governor’s Legislative Council, escaped censure.  Despite Bruce’s striving for profits, A L Bruce Estates lost money but was saved from insolvency by the colonial government’s need for land for resettlement following a famine in 1949.  Shortly before his death in 1954, Bruce was able to sell the company’s Nyasaland estates, repay its debts and realise a surplus.

Bra Boys: Blood Is Thicker than Water: Bra Boys: Blood is Thicker than Water is a 2007 Australian Documentary film about a surf gang on Sydney's Maroubra Beach released in March 2007.  The film details a story of the Bra Boys from the viewpoint of the gang members, particularly the Abbertons.  Sunny Abberton wrote and co-directed the film with Macario De Souza.  Actor Russell Crowe was producer and provided narration.  The film's official cast included 49 well known surfers from Bra Boys members Evan Faulks and Richie 'Vas' Vaculik to ten-time world champion Kelly Slater.  Other participating prominent surfers include Mark Occhilupo, Bruce Irons, and Laird Hamilton.

Frontal solver: A frontal solver, due to Bruce Irons is an approach to solving sparse linear systems which is used extensively in finite element analysis.  It is a variant of Gauss elimination that automatically avoids a large number of operations involving zero terms.

Sorcha Cusack: Sorcha Cusack (] ) (born 9 April 1949) is an Irish actress.  Cusack was born in Dublin, Ireland, a daughter of the actors Cyril Cusack (d. 1993) and Mary Margaret "Maureen" Kiely, the sister of actresses Sinéad Cusack, Niamh Cusack and Catherine Cusack.  Through her sister Sinéad, she is the sister-in-law of actor Jeremy Irons and the aunt of actor Max Irons and his brother, the former child actor Samuel Irons.

Bruce Irons (surfer): Bruce Irons (born November 16, 1979) is an American regularfoot professional surfer from Hanalei, Kauai and younger brother of three-time world champion Andy Irons.  Best known for his radical aerial maneuvers and fearless tuberiding abilities, he claims he will surf any wave on the planet.

Patch test (finite elements): The patch test in the finite element method is a simple indicator of the quality of a finite element, developed by Bruce Irons.

Supporting paragraphs: Bruce Irons (surfer) Andy Irons
Answer: Andy Irons