"Time Changes Everything" is a Western swing standard with words and music written by Tommy Duncan, the long-time vocalist with Bob Wills and the Texas Playboys.
 Written as a ballad, the lyrics tell of a failed romance and of the hurt that has healed.
 Each verse ends with:
Emmett Miller (February 2, 1900 – March 29, 1962) was an American minstrel show performer and recording artist known for his falsetto, yodel-like voice.
 Little remembered today, Miller was a major influence on many country music singers, including Hank Williams, Jimmie Rodgers, Bob Wills, Milton Brown, Tommy Duncan, and Merle Haggard.
 His music is a link between old-time Southern music, minstrelsy, jazz, and Western swing.
Thomas Elmer Duncan (January 11, 1911 – July 25, 1967), better known as Tommy Duncan, was a pioneering American Western swing vocalist and songwriter who gained fame in the 1930s as a founding member of The Texas Playboys.
 He recorded and toured with bandleader Bob Wills on and off into the early 1960s.
"Take Me Back to Tulsa" is a Western swing standard song.
 Bob Wills and Tommy Duncan added words to the traditional fiddle tune "Walkin' Georgia Rose" in 1940.
 The song takes its name from the chorus:
"Stay a Little Longer" is a Western swing dance tune written by Bob Wills and Tommy Duncan.
 The title comes from a refrain in the chorus:
James Robert Wills (March 6, 1905 – May 13, 1975) was an American Western swing musician, songwriter, and bandleader.
 Considered by music authorities as the co-founder of Western swing, he was universally known as the King of Western Swing (after the death of Spade Cooley who used the moniker "King Of Western Swing" from 1942 to 1969).
"San Antonio Rose"/"New San Antonio Rose" was the signature song of Bob Wills and His Texas Playboys.
 "San Antonio Rose" was an instrumental song written by Bob Wills, who first recorded it with the Playboys on November 28, 1938.
 Band members added lyrics and it was retitled ""New" San Antonio Rose".
 A fresh recording was made on April 16, 1940 (Okeh 05694) with a vocal by Tommy Duncan.
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A Turkish name consists of an "ad" or an "isim" (given name; plural "adlar" and "isimler") and a "soyadı" or "soyisim" (surname).
 Turkish names exist in a "full name" format.
 While there is only one "soyadı" (surname) in the full name there may be more than one "ad" (given name).
 Married women may carry both their maiden and husband's surnames.
 The "soyadı" is written as the last element of the full name, after all given names (except that official documents often use the format "Soyadı, Adı").
"New Spanish Two Step" is a Western swing standard based on a traditional fiddle tune, "Spanish Two Step," which was one of Bob Wills and His Texas Playboys signature songs.
 Wills and his vocalist, Tommy Duncan, added lyrics to reflect the title:
The Light Crust Doughboys is an American Western swing band from Texas organized in 1931 by the Burrus Mill and Elevator Company in Saginaw, Texas.
 The band achieved its peak popularity in the few years leading up to World War II.
 In addition to launching Western swing pioneers Bob Wills and Milton Brown, it provided a platform for many of the best musicians of the genre, including Tommy Duncan, Cecil Brower, John Parker and Kenneth Pitts.

Question: What was the full name of the leader of the band that Tommy Duncan was a part of?
Answer: James Robert Wills