Question: In what year was Alice Walton's brother born?

Context articles: Mathias Barrett
Llama Company
Derrick Walton
Teddy Walton
S. Robson Walton
Bill Walton
Ann Walton Kroenke
John Walton (Continental Congress)
Alice Walton
Crystal Bridges Museum of American Art

Brother Mathias Barrett (1900–1990) was a Catholic Brother born in Ireland who founded a number of homes to help serve the needy and homeless throughout North America.
 He is also the founder of The Little Brothers of the Good Shepherd.
The Llama Company was an investment bank founded by Alice Walton as a subsidiary of Walton Enterprises.
 It was headquartered in Fayetteville, Arkansas, and was founded in 1988, and was engaged in corporate finance, public and structured finance, real estate finance and sales and trading.
 Walton was President, Chairperson, and CEO of the company.
 The Walton family also operates a commercial bank, Arvest Bank.
 Alice's ownership stake in Llama likely prevented her from having equity in Arvest.
Derrick Walton Jr. (born April 3, 1995) is an American basketball player for the Miami Heat of the National Basketball Association (NBA), on a two-way contract with the Heat's NBA G League affiliate, the Sioux Falls Skyforce.
 Walton played college basketball for the Michigan Wolverines.
 In high school, he was a 2013 "Parade" All-American, the 2013 Michigan Boys Basketball Gatorade Player of the Year and the runner up in the 2013 Mr. Basketball of Michigan as a senior at Chandler Park Academy.
 He was a 2013–14 Big Ten Conference men's basketball season All-Freshman selection in the Big Ten for the 2013–14 team, which won the 2013–14 Big Ten Conference regular-season championship outright.
 He was a 2015–16 Big Ten Conference men's basketball season All-Big Ten third team selection by the coaches and honorable mention selection by the media as a junior.
 He was a 2016–17 Big Ten Conference men's basketball season All-Big Ten second team selection by the coaches and the media as a senior.
 Walton is the only Wolverine with 1,000-points, 500-rebounds and 400-assists and holds the school single-game assist record (16).
 He was the Most Outstanding Player of the 2017 Big Ten Conference Men's Basketball Tournament for the tournament champion 2016–17 Wolverines.
Travis Walton, professionally known as Teddy Walton, was born July 30, 1992 in Memphis, Tennessee.
 Teddy is an American composer, producer, songwriter and dj.
 He began music production by creating songs with his older brother, rapper June, eventually releasing a project titled “EVOL” He later went on to release a series of EP’s on Soundcloud, “Girls Night Out”, “Nights”, and “The After Party”, which gained him recognition and the start of his online presence.
 Teddy has worked with several artists such as Kendrick Lamar, Bryson Tiller, ASAP Rocky, Nipsey Hussle, Schoolboy Q, Freddie Gibbs, GoldLink, Maxo Kream, Vince Staples, ASAP Ferg, and Big K.R.I.T..
 He is currently working on his album, “Tokyo Highway”, due later in 2017.
 Teddy has developed his own genre of music blending trap, R&B, and hip-hop, with influences from Three 6 Mafia, Tame Impala, and SWV.
Samuel Robson "Rob" Walton (born October 28, 1944) is an American businessman and is the eldest son of Helen Walton and Sam Walton, founder of Walmart, the world's largest retailer.
 He served as Chairman of Walmart from 1992 to 2015.
 In October 2012, Walton was listed as the 11th richest person in the world.
William Theodore Walton III (born November 5, 1952) is an American retired basketball player and television sportscaster.
 Walton became known playing for John Wooden's powerhouse UCLA Bruins in the early 1970s, winning three successive College Player of the Year Awards, while leading the Bruins to two Division I national titles.
 He then went on to have a prominent career in the National Basketball Association (NBA) where he was a league Most Valuable Player (MVP) and won two NBA championships.
 His professional career was significantly hampered by multiple foot injuries.
 Walton was inducted into the Naismith Memorial Basketball Hall of Fame on May 10, 1993 and the Oregon Sports Hall of Fame that same year.
Ann Walton Kroenke (born December 18, 1948) is an heiress to the Wal-Mart fortune.
 Kroenke and her sister, Nancy Walton Laurie, inherited stock from her father, Bud Walton (died 1995), who was brother and an early business partner of Wal-Mart founder Sam Walton.
John Walton (1738–1783) was a Georgia delegate to the Continental Congress.
 Though born in Virginia, Walton later became a planter near Augusta, Georgia.
 He was elected as a delegate from St. Paul Parish to the Provincial Congress at Savannah in 1775, and then elected to the Continental Congress in 1778.
 He signed the Articles of Confederation on behalf of Georgia on July 24, 1778.
 He held the office of surveyor of Richmond County for several years before his death in New Savannah, Georgia in 1783.
 His brother was George Walton, a signer of the Declaration of Independence for Georgia and one of the first governors of Georgia.
Alice Louise Walton (born October 7, 1949) is an American heiress to the fortune of Wal-Mart Stores, Inc. She is the daughter of Wal-Mart founder Sam Walton and Helen Walton, and sister of S. Robson Walton, Jim Walton and the late John T. Walton.
 With a net worth of $40.8 billion she is the wealthiest woman in the world, according to "Forbes", following the death of Liliane Bettencourt in September 2017.
Crystal Bridges Museum of American Art is a museum of American art in Bentonville, Arkansas.
 The museum, founded by Alice Walton and designed by Moshe Safdie, officially opened on 11 November 2011.
 It offers free public admission.