Anthony Dirrell (born October 14, 1984) is an American professional boxer who held the WBC super middleweight title from 2014 to 2015.
 He is the younger brother of 2004 Olympic bronze medalist Andre Dirrell, who is also a professional boxer.
Luke 'Robbo' Blackledge ( (1990--) 6 1990 (age 27 ) ), born in Clitheroe, is an English professional super middleweight, and light heavyweight boxer who has won the British Masters light-heavyweight title, World Boxing Council (WBC) International Silver super middleweight title, and Commonwealth super middleweight title, and has been a challenger for the World Boxing Council (WBC) Youth World light heavyweight title, and World Boxing Organization (WBO) Youth Intercontinental light heavyweight title a defeat by Erik Skoglund, British Boxing Board of Control (BBBofC) Central (England) Area super middleweight title a draw with Alistair Warren, and Commonwealth (British Empire) super middleweight title a defeat by Rocky Fielding.
"Super" Scott Dixon ( (1976--) 28 1976 (age (2017)-(1976)-((11)<(09)or(11)==(09)and(30)<(28)) ) ) born in Hamilton is a Scottish professional feather/super feather/light/light welter/welter/light middle/middle/super middleweight boxer of the 1990s, 2000s and 2010s, who won the British Boxing Board of Control (BBBofC) Scottish Area welterweight title, World Boxing Board (WBB) welterweight title, World Boxing Union (German Version) super middleweight title, and Commonwealth welterweight title, and was a challenger for the World Athletic Association (WAA) welterweight title against Michael Carruth, BBBofC British welterweight title against Derek Roche, World Boxing Federation (WBF) light middleweight title against Steve Roberts, World Boxing Organization (WBO) Inter-Continental light middleweight title against Anthony Farnell, and World Boxing Union (WBU) light middleweight title against Mehrdad Takalobigashi, his professional fighting weight varied from 125 lb , i.e. featherweight to 167+1/2 lb , i.e. Super middleweight.
Jermain "Choo Choo" Mackey ( (1979--) 27 1979 (age 37 ) ) born in Nassau is a Bahamian professional middle/super middle/light heavyweight boxer of the 2000s and 2010s who won the Bahamas super middleweight title, World Boxing Council (WBC) Caribbean Boxing Federation (CABOFE) super middleweight title, World Boxing Association (WBA) Fedecaribe super middleweight title, Commonwealth super middleweight title, and was a challenger for the World Boxing Organization (WBO) North American Boxing Organization (NABO) super middleweight title against Jean Pascal, WBC International super middleweight title against Adonis Stevenson, and World Boxing Association Fedelatin super middleweight title against Kirt Sinnette, his professional fighting weight varied from 160+3/4 lb , i.e. welterweight to 170 lb , i.e. light heavyweight.
 He represented the Bahamas at the 2002 Commonwealth Games.
Dean "Star" Francis ( (1974--) 23 1974 (age (2017)-(1974)-((11)<(01)or(11)==(01)and(30)<(23)) ) ) is an English professional super middle/light heavy/cruiserweight boxer of the 1990s, 2000s and 2010s who has won the British Boxing Board of Control (BBBofC) British super middleweight, BBBofC English cruiserweight title, European Boxing Union (EBU) super middleweight title, World Boxing Organization (WBO) Inter-Continental super middleweight title, International Boxing Organization (IBO) Inter-Continental light heavyweight title, BBBofC British light heavyweight title, British Masters light-heavy title, and Commonwealth super middleweight title, and was a challenger for the World Boxing Council (WBC) International super middleweight title against Jaffa Ballogou, BBBofC British super middleweight title against Matthew Barney, his professional fighting weight has varied from 167 lb , i.e. super middleweight to 181 lb , i.e. cruiserweight.
Andre Thysse ( (1968--) 07 1968 (age (2017)-(1968)-((11)<(02)or(11)==(02)and(30)<(07)) ) ) born in Germiston, is a South African professional super middle/light heavyweight boxer of the 1990s and 2000s who won the Gauteng super middleweight Title, South African super middleweight title, and Commonwealth super middleweight title, and was a challenger for the International Boxing Organization (IBO) super middleweight title against Brian Magee, World Boxing Council (WBC) super middleweight title against Markus Beyer, World Boxing Council (WBC) International super middleweight title against Mikkel Kessler, WBC International super middleweight title against Jürgen Brähmer, World Boxing Council (WBC) Continental Americas super middleweight title against Lucian Bute, World Boxing Council (WBC) International light heavyweight title against Adrian Diaconu, and International Boxing Federation (IBF) Australasian super middleweight title against Sakio Bika, his professional fighting weight varied from 163+3/4 lb , i.e. super middleweight to 175 lb , i.e. light heavyweight.
Henry Wharton ( (1967--) 23 1967 (age 50 ) ) born in Leeds is an English professional middle/super middle/light heavy/cruiserweight boxer of the 1980s and '90s who won the British Boxing Board of Control (BBBofC) British super middleweight, European Boxing Union (EBU) super middleweight title, and Commonwealth super middleweight title, and was a challenger for the World Boxing Council (WBC) super middleweight title against Nigel Benn, and Robin Reid, and World Boxing Organization (WBO) super middleweight title against Chris Eubank, his professional fighting weight varied from 162 lb , i.e. middleweight to 179 lb , i.e. cruiserweight.
Andre Dirrell (born September 7, 1983) is an American professional boxer.
 He has held the IBF interim super middleweight title since May 2017, having previously challenged for the full IBF title in 2015 and the WBC super middleweight title in 2009.
 As an amateur, Dirrell won a bronze medal in the middleweight division at the 2004 Olympics.
James Obede "Hot Ice" Toney ( (1980--) 05 1980 (age (2017)-(1980)-((11)<(08)or(11)==(08)and(30)<(05)) ) ) born in Accra is a Ghanaian professional middle/super middle/light heavy/cruiserweight boxer of the 2000s and 2010s who won the African Boxing Union (ABU) middleweight title, World Boxing Council (WBC) International middleweight title, and Commonwealth middleweight title, and was a challenger for the World Boxing Council (WBC) International middleweight title against Sergey Tatevosyan, and North American Boxing Federation (NABF) super middleweight title, North American Boxing Association (NABA) super middleweight title, and World Boxing Council (WBC) Continental Americas super middleweight title, against Lucian Bute, his professional fighting weight varied from 157 lb , i.e. middleweight to 185 lb , i.e. cruiserweight.
Rod Carr ( (1968--) 09 1968 (age (2017)-(1968)-((11)<(10)or(11)==(10)and(30)<(09)) ) ) is an Australian professional welter/light middle/middle/super middle/light heavy/cruiserweight boxer of the 1980s and '90s who won the Oriental and Pacific Boxing Federation (OPBF) super middleweight title, Trans-Tasman super middleweight title, Australian super middleweight title, and inaugural Commonwealth super middleweight title, and was a challenger for the International Boxing Organization (IBO) super middleweight title against Rick Thornberry, and inaugural Pan Asian Boxing Association (PABA) light heavyweight title against Anthony Bigeni, his professional fighting weight varied from 164 lb , i.e. super middleweight to 180+1/2 lb , i.e. cruiserweight.

Question: Anthony Dirrell is the brother of which super middleweight title holder?
Answer: Andre Dirrell