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- Panic! at the Disco lifted the name from the lyrics of a song called "Panic," by Name Taken: "Panic at the disco / Sat back and took it so slow."
- Paramore According to Hayley Williams, the name "Paramore" came from the maiden name of the mother of one of their first bass players. Once the group learned the meaning of the homophone "paramour" ("secret lover"), they decided to adopt the name, using the Paramore spelling.
- Pearl Jam - The band's first name was "Mookie Blaylock" after the All-Star basketball player, but the name was changed to "Pearl Jam" due to trademark concerns. Vocalist Eddie Vedder claimed in an early interview that the name was a reference to his great-grandmother Pearl Brunner. In 2006 guitarist Mike McCready said that bass player Jeff Ament came up with "Pearl" and that "Jam" was added after seeing Neil Young live.
- Pink Floyd - Playing under multiple names, including "Tea Set", when the band found themselves on the same bill as another band with the same name, Syd Barrett came up with the alternative name The Pink Floyd Sound, after two blues musicians, Pink Anderson and Floyd Council. For a time after this they oscillated between The Tea Set and The Pink Floyd Sound, with the latter name eventually winning out. The Sound was dropped fairly quickly, but the definite article was still used regularly until 1970. The group's UK releases during the Syd Barrett era credited them as The Pink Floyd as did their first two U.S. singles. 1969's More and Ummagumma albums credit the band as Pink Floyd, produced by The Pink Floyd, while 1970's Atom Heart Mother credits the band as The Pink Floyd, produced by Pink Floyd. David Gilmour is known to have referred to the group as The Pink Floyd as late as 1984.
- Pixies — selected randomly from a dictionary by guitarist Joey Santiago. The band took a liking to the word's definition, "mischievous little elves". The name was shortened from the original, "Pixies In Panoply".
- +44 — pronounced "plus forty four," a reference to the international dialing code of the United Kingdom, where band members Mark Hoppus and Travis Barker first discussed the project.
- The Pogues — Originally called Póg mo Thóin - Gaelic for "Kiss my ass". Pog Shortened to The Pogues after complaints received by the BBC.
- Porno for Pyros — inspired by the Los Angeles riots of 1992.
- Portishead - Named after the English town of Portishead, Somerset, the hometown of one of the band's founding members, Geoff Barrow.
- Procol Harum — The band was named after the pedigree name of a Siamese cat that belonged to a friend of Guy Stevens, the band's manager. The name was Procul Harun, which is Latin for "Beyond these things", but was written down incorrectly by Keith Reid. The band would say in interviews that the cat was a Burmese Blue, though all cats with the name are the Devon Rex breed.
Read more about this topic: List Of Band Name Etymologies