Jeffrey Hammond (born 30 July 1946), often known by his former stage name Jeffrey Hammond-Hammond, is an artist and retired musician best known for being the bassist of progressive rock band Jethro Tull from 1971 to 1975. With Jethro Tull, Hammond played on some of the band's most successful and well-known albums, including Aqualung (1971) and Thick as a Brick (1972). Hammond adopted the name "Hammond-Hammond" as a joke, since both his father's surname and mother's maiden name were the same. He also joked in interviews that his mother defiantly chose to keep her maiden name, just like Eleanor Roosevelt. Musician with Jethro Tull One of several band members of Jethro Tull to originate from Blackpool, England, Hammond met the band's leader Ian Anderson in school when he was 17 years old, eventually joining a band with him and future band members John Evan and Barriemore Barlow. After leaving grammar school Hammond opted to study painting rather than continue with music, but was convinced to join Jethro Tull in January 1971. Before joining the band as a performer, he appears to have spent much time with the band in the background. Anderson wrote songs about his friend's idiosyncrasies, of which the best known are "A Song for Jeffrey" (on the album This Was), "Jeffrey Goes to Leicester Square" (Stand Up) and "For Michael Collins, Jeffrey and Me" (Benefit). Hammond is also mentioned in the lyrics of the Benefit track "Inside". Hammond is credited with naming the "claghorn", a hybrid instrument. Ian Anderson took the mouthpiece from a saxophone and bell of a toy trumpet and attached them to the body of a bamboo flute. The result can be heard on the track "Dharma for One" on the album This Was. According to Anderson, "clag" was a term Hammond used for feces, "so 'claghorn' presumably because it sounded shit!" During the time of Jethro Tull's dramatic stage costumes, Hammond began to wear a black-and-white-striped suit and played a matching bass guitar; this became his trademark and a feature of the group's Thick as a Brick stage performance. He narrated the surreal piece "The Story of the Hare Who Lost His Spectacles" on the album A Passion Play, and the related short film. He also received credit, along with Anderson and John Evan, for writing the piece. Hammond burned the suit in December 1975 upon his departure from the band. According to