Gunnar Lúðvík Nelson (born 28 July 1988) is an Icelandic mixed martial artist currently competing in the Welterweight division of the Ultimate Fighting Championship.
 He is a black belt in Brazilian Jiu-Jitsu, which was awarded by Renzo Gracie after impressive results at the 2009 IBJJF Pan-Ams and the 2009 ADCC Submission Wrestling World Championship.
 He is currently ranked #11 in the official UFC Welterweight rankings.
 Gunnar is a teammate of fellow UFC fighter and Lightweight Champion Conor McGregor, and is a member of Mjölnir gym in Iceland, and SBG Ireland.
Renzo Gracie ( ; ] ; born March 11, 1967) is a Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner.
 A member of the Gracie family of Brazil, Renzo is a 6th Degree Black in Brazilian Jiu-Jitsu under Carlos Gracie Jr..
 He is the son of Robson Gracie, grandson of Carlos Gracie, nephew of Carlos Gracie, Jr. grandnephew of Helio Gracie, and the 1st cousin once removed of Royce Gracie.
 In mixed martial arts, Renzo has competed in the Ultimate Fighting Championship, Pride Fighting Championships, K-1, RINGS, and International Fight League (head-coaching the New York Pitbulls).
 He holds notable victories over five former UFC Champions: Frank Shamrock (UFC Light Heavyweight Champion), Carlos Newton (UFC Welterweight Champion), Pat Miletich (UFC Welterweight Champion), Maurice Smith (UFC Heavyweight Champion), and Oleg Taktarov (UFC 6 Tournament Winner)
Greg Jackson (born 1974) is an American mixed martial arts (MMA) trainer who co-owns Jackson Wink MMA Academy in Albuquerque, New Mexico, widely considered one of the top MMA training centers in the world.
 Jackson has trained many successful fighters, including former UFC Light Heavyweight Champion Jon Jones, former UFC Welterweight Champion Georges St-Pierre, former UFC Women's Bantamweight Champion Holly Holm, former Light Heavyweight Champion Rashad Evans, and a roster of other UFC contenders and World Extreme Cagefighting champions.
Clayton "Clay" French (born October 7, 1980) is an American mixed martial artist who fought on Pride Fighting Championships, Sengoku, KOTC and other several fighting organizations.
 He holds a notable victory over TUF winner Mac Danzig by split decision and has trained with former UFC welterweight champion Matt Hughes.
Stephen Randall Thompson (born February 11, 1983) is an American professional mixed martial artist and former professional full-contact kickboxer who currently fights as a welterweight in the Ultimate Fighting Championship.
 Thompson is undefeated through 37 amateur and 57 professional kickboxing matches, with 40 wins by knockout.
 He is currently #1 in official UFC welterweight rankings and ranked as the #2 welterweight in the world by Sherdog.
 He has trained with former UFC Welterweight Champion Georges St-Pierre and currently trains with his brother in law, former UFC Middleweight Champion Chris Weidman.
Carlos Newton (born August 17, 1976) is an Anguillian-born Canadian retired mixed martial artist and one of the original MMA pioneers.
 He is a former UFC Welterweight Champion and Pride FC Japan MMA Legend.
 Known as "The Ronin", he competed worldwide in the biggest MMA organizations including UFC, Pride FC, IFL, K-1, Shooto and most recently W-1.
 He is a 3rd Degree Brazilian Jiu-Jitsu Black Belt alongside his coach Terry Riggs, at Warrior MMA in Newmarket, Ontario.
 Newton has always been considered a fan favourite and a "Submission Master" and has dubbed his personal fighting style—an amalgam of Brazilian Jiu-Jitsu, judo, wrestling and boxing as "Dragon Ball Jiu-Jitsu" in tribute to "Dragon Ball", a Japanese manga series.
 As a testament to his worldwide popularity, Newton is one of only a few MMA athletes to ever be allowed to compete in the UFC and Pride FC at the same time.
Robert Glenn "Robbie" Lawler (born March 20, 1982) is an American professional mixed martial artist and former UFC Welterweight Champion.
 A professional competitor since 2001, Lawler is also a former EliteXC Middleweight Champion, and has formerly competed in Strikeforce, PRIDE, and the IFL.
 He is widely considered one of the most consistently entertaining mixed martial artists currently competing, being the only fighter to have won three consecutive "Fight of the Year" awards from Sherdog and MMA Fighting, for his bouts against Johny Hendricks (at UFC 171, in 2014), Rory MacDonald (at UFC 189, in 2015), and Carlos Condit (at UFC 195, in 2016).
Din Yero Thomas (born September 28, 1976) is a retired American mixed martial artist who was featured on The Ultimate Fighter 4: The Comeback.
 In the Ultimate Fighting Championships, Thomas is a UFC 41 Lightweight Tournament Semifinalist.
 He holds a Black belt in Brazilian Jiu-Jitsu under Ricardo Liborio and currently runs two successful Brazilian Jiu-Jitsu and MMA academies in Port St. Lucie, Florida.
 Thomas holds notable victories of (UFC Lightweight Champion) Jens Pulver, (UFC Welterweight Champion) Matt Serra, and (Strikeforce Lightweight Champion) Clay Guida.
Jay Dee "B.J." Penn (born December 13, 1978) is an American professional mixed martial artist and Brazilian Jiu-Jitsu practitioner.
 Penn debuted and competed in the Ultimate Fighting Championship (UFC), and later in K-1.
 Prior to fighting for the UFC, he became the first American Gold medalist of the World Jiu-Jitsu Championship.
 In mixed martial arts, Penn has competed in the Featherweight, Lightweight, Welterweight, and Middleweight divisions.
 As a former UFC Lightweight Champion and UFC Welterweight Champion, he is one of only three fighters in UFC history to win titles in multiple weight classes.
 Penn was also a Co-champion in the UFC 41 Lightweight Tournament, due to an eventual draw opposite Caol Uno in the tournament finale.
 Through his tenures as champion, Penn unofficially unified the UFC Lightweight Championship (against Sean Sherk) and broke the all-time lightweight title defense record.
 Penn was inducted into the UFC Hall of Fame, as the inaugural inductee in the Modern-Era Wing by career-long rival Matt Hughes, during "International Fight Week" in July 2015.
Daniel Jeffery Henderson (born August 24, 1970) is an American former mixed martial artist and Olympic wrestler, who last competed as a middleweight in the Ultimate Fighting Championship.
 He was the last Strikeforce Light Heavyweight Champion and was the last Welterweight (80 kg ) and Middleweight (95 kg ) champion of Pride Fighting Championships.
 Additionally, Henderson was the Brazil Open '97 Tournament Champion, the UFC 17 Middleweight Tournament Champion, the Rings: King of Kings 1999 Tournament Champion and the Pride Weltwerweight Grand Prix Tournament Champion.
 During his career, Henderson also challenged for the UFC Middleweight Championship (2x), the UFC Light Heavyweight Championship and the Strikeforce Middleweight Championship.
 He was the first mixed martial artist to concurrently hold two titles in two different weight classes in a major MMA promotion.
 At the time of his retirement after UFC 204, he was the oldest fighter on the UFC roster.
 Known to be one of the greatest mixed martial artists of all time having defeated a total of seventeen MMA world champions across four major MMA promotions (UFC, PRIDE FC, Strikeforce, and RINGS).

Question: Renzo Gracie is a Brazilian mixed marital artist who holds a notable victory over a former UFC Welterweight Champion and Pride FC Japan MMA Legend who is known as what?
Answer: The Ronin