Late BEATLE John Lennon's widow Yoko Ono is suing a singer/songwriter for naming her band LENNON. Ono has filed court papers accusing rocker Lennon Murphy of fraudulently registering Lennon as a trademark and for the "tarnishment" and exploitation of her late husband's name. The 74-year-old wants the trademark cancelled, reports TMZ.com. However, Murphy insists Ono and her lawyer approved the use of the name Lennon for her debut album in 2000. Murphy writes on her page on website MySpace: "If Yoko prevails, Lennon might never be able to tour or release records using the name Lennon." John Lennon was shot dead in New York City in December 1980.