Claim: One of the Beatles's co-founders was John Lennon.
Evidence: With members John Lennon , Paul McCartney , George Harrison and Ringo Starr , they became widely regarded as the foremost and most influential act of the rock era.
John Winston Ono Lennon , -LRB- born John Winston Lennon ; 9 October 19408 December 1980 -RRB- was an English guitarist , singer , and songwriter who co-founded the Beatles , the most commercially successful and musically influential band in the history of popular music.