In it’s early incarnations, Pink Floyd had a number of short-lived names including: Sigma Six, The Meggadeaths, The (Screaming) Abdabs, Leonard’s Lodgers, The Spectrum Five, and The Tea Set. The band had settled on “The Tea Set”, but soon after discovered another band with the same name.
Initially referred to as “The Pink Floyd Sound”, the name was derived from two blues musicians that lead singer Syd Barrett had in his collection: Pink Anderson and Floyd Council. The band became know simply as “Pink Floyd” in 1967, around the same time that the group signed with EMI. (Wikipedia)