Question: Boston Custer was the youngest brother of which two-time Medal of Honor recipient?

Context paragraphs:
Peter C. Lemon: Peter Charles Lemon (born June 5, 1950) is a former United States Army soldier and a recipient of the U.S. military's highest award, the Medal of Honor.  He received the award for his actions on April 1, 1970, while serving in Tây Ninh Province during the Vietnam War.  He dedicates the Medal of Honor to the three comrades he lost in the battle which he received the award for: Casey Waller, Nathan Mann and Brent Street.  Lemon is the only Canadian-born U.S. citizen to be presented the medal for fighting in the Vietnam War.  He is the eighth-youngest living Medal of Honor recipient.

War Is a Racket: War Is a Racket is the title of two works, a speech and a 1935 short book, by Smedley D. Butler, a retired United States Marine Corps Major General and two-time Medal of Honor recipient.  Based on his career military experience, Butler frankly discusses how business interests commercially benefit (including war profiteering) from warfare.  He had been appointed commanding officer of the Gendarmerie during the United States occupation of Haiti, which lasted from 1915 to 1934.

Texas Medal of Honor Memorial: The Texas Medal of Honor Memorial is a statue commemorating recipients of the Medal of Honor from the state of Texas.  Sculpted by Doyle Glass and Scott Boyer, it was dedicated on Memorial Day of 2008 and is located in Midland, Texas, at the Commemorative Air Force International Headquarters.  The Memorial depicts Medal of Honor recipient George H. O'Brien, Jr. as he would appear on the day he earned the Medal of Honor for his service during the Korean War.  Perched on a rock, the heroic-sized bronze figure rises above a granite base, which displays the names of most recipients of the medal from Texas.  The Model for this statue was Buck Hartlage a Louisville Kentucky native.

Boston Custer: Boston Custer (October 31, 1848 – June 25, 1876) was the youngest brother of U.S. Army Lt Colonel George Armstrong Custer and two-time Medal of Honor recipient Captain Thomas Custer.  He was killed at the Battle of the Little Bighorn along with his two brothers.

Henry Armstrong Reed: Henry Armstrong Reed (April 27, 1858 – June 25, 1876) was the nephew of George Armstrong Custer, Thomas Custer, and Boston Custer.  Although not an official soldier, he was killed along with them at the Battle of the Little Bighorn at the age of 18.

Kentucky Medal of Honor Memorial: The Kentucky Medal of Honor Memorial is located at the corner of Fifth and Jefferson Streets in downtown Louisville, Kentucky, on the grounds of the old Jefferson County Courthouse.  The Memorial honors all recipients of the Medal of Honor from the Commonwealth of Kentucky.  The Memorial was sculpted by Doyle Glass and dedicated on Veterans Day 2001.  The Memorial features a life-size bronze statue of Medal of Honor recipient John C. Squires as he would appear on the night he earned the Medal of Honor.  Squires, a native of Louisville, was killed in action in Italy during World War II.  The statue of Squires stands on a 4 ft granite base.  A plaque on the base lists the names of each recipient of the Medal of Honor from Kentucky.

John William Finn: John William Finn (23 July 1909 – 27 May 2010) was a sailor in the United States Navy who, as a chief petty officer, received the United States military's highest decoration, the Medal of Honor, for his actions during the attack on Pearl Harbor in World War II.  As a chief aviation ordnanceman stationed at Naval Air Station Kaneohe Bay, he earned the medal by manning a machine gun from an exposed position throughout the attack, despite being repeatedly wounded.  He continued to serve in the Navy and in 1942 was commissioned an ensign.  In 1947 he was reverted to chief petty officer, eventually rising to lieutenant before his 1956 retirement.  In his later years he made many appearances at events celebrating veterans.  At the time of his death, Finn was the oldest living Medal of Honor recipient, the last living recipient from the attack on Pearl Harbor, and the last United States Navy recipient of World War II.

Robert Blake (Medal of Honor): Robert Blake was a Union Navy sailor during the American Civil War and a recipient of America's highest military decoration, the Medal of Honor.  Blake was the second African American to perform a Medal of Honor action; William Harvey Carney was the first.  Blake was the first African American to actually "receive" a Medal of Honor - his was presented to him in 1864, while Carney did not receive his until 1900.  But, because Carney's Medal of Honor action occurred first, Carney, not Blake, is usually credited with being the first African American Medal of Honor recipient.

Thomas Custer: Thomas Ward Custer (March 15, 1845 – June 25, 1876) was a United States Army officer and two-time recipient of the Medal of Honor for bravery during the American Civil War.  He was a younger brother of George Armstrong Custer's, and perished with him and their younger brother, Boston Custer, at Little Bighorn in the Montana Territory.

Dakota Meyer: Dakota Louis Meyer (born June 26, 1988) is a veteran of the United States Marine Corps and the War in Afghanistan.  He was awarded the Medal of Honor for his actions during the Battle of Ganjgal on September 8, 2009, in Kunar Province, Afghanistan.  Meyer is the second youngest living Medal of Honor recipient, the third living recipient for either Operation Iraqi Freedom or Operation Enduring Freedom – Afghanistan and the first living Marine in 38 years to be so honored.

Supporting paragraphs: Boston Custer Thomas Custer
Answer: Thomas Ward Custer