Jeremy Barnes (born September 18, 1976) is an American musician. He was born in Albuquerque, New Mexico, the son of a local businessman. In 1995 he moved to Chicago to attend DePaul University but later dropped out. He joined the band Neutral Milk Hotel in January 1996. The band disbanded in 1998 and Barnes spent time traveling in Europe and working as a postman. He also played with The Gerbils and Bablicon. In 2001 he formed A Hawk and a Hacksaw, in France. In 2005 he met Heather Trost, who became his primary foil in the band and in life. They have expanded A Hawk and A Hacksaw's line-up over the years to include Hungarian, Romanian, and English musicians.
Barnes recorded a song for a Japanese compilation under the name Marta Tennae in 2001, and shortly thereafter self-released an album under the same name. He is currently crediting his work in Bablicon under the Marta Tennae moniker.
Barnes is credited with composing the original score for Astra Taylor's 2005 documentary film Zizek!.