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Keller Williams (born February 4, 1970) is an American musician from Fredericksburg, Virginia, who began performing in the early 1990s. He is also known by the names K-Dub or just Keller, when performing. Williams' music combines elements of bluegrass, folk, alternative rock, reggae, electronica/dance, jazz, funk, and other assorted genres. He is often described as a 'one-man jam-band' due to his frequent use of live phrase looping with multiple instruments.

Though primarily a solo artist, Williams has toured with several bands that include Yonder Mountain String Band, The String Cheese Incident, Umphrey's McGee and Ratdog, and has frequently performed at The Bonnaroo Music and Arts Festival, the AllGood Music Festival, Summer Camp Music Festival, and the The Rothbury Festival. Williams has an audio taping policy of his performances, and for non-commercial trading of the recordings but use of video or flash photography, or any recordings for profit are prohibited.

Keller Williams Incident is a collaborative performance between Williams and The String Cheese Incident. They have performed together, and Williams' 1999 album Breathe was released collaboratively as the Keller Williams Incident. Williams and SCI began collaborating after Williams saw the band perform in Colorado; offering to play with the band in exchange for free ski passes.

Gary J. Keller (born June 13, 1944) is a former American college and professional basketball player who was a center and power forward in the American Basketball Association (ABA) for two seasons during the late 1960s. Keller played college basketball for the University of Florida, and thereafter, he played professionally for the Minnesota Muskies and the Miami Floridians of the ABA.

Keller was born in Elizabeth, New Jersey in 1944. He grew up in St. Petersburg, Florida, where he attended Dixie M. Hollins High School. He played high school basketball for the Dixie Hollins Rebels, winning back-to-back Florida state championships in 1961 and 1962. He was a McDonald's fourth-team high school All-American selection as a senior.

Keller received an athletic scholarship to attend the University of Florida in Gainesville, Florida, and played for coach Norm Sloan and coach Tommy Bartlett's Florida Gators men's basketball teams from 1965 to 1967. The Gators finished 21–4 in 1967—their best-ever win-loss record up to that time. Keller was an Academic All-American, and graduated from Florida with a bachelor's degree in business administration in 1967. He was later inducted into the University of Florida Athletic Hall of Fame as a "Gator Great," and was recognized as an SEC Basketball Legend in 2003.