The name is derived from Malay and the original was Pulao Pi ah Pi, where in pulao is the Malay word for island, and pi, pronounced with only a half p sound, was  very close in pronunciation to the English word be; the ah was eventually dropped, so the name was said something like Bi Bi.  Later the P was pronounced with a stronger aspiration and the name became the Pi Pi we know today (the h with which it is usually spelled is confusing and superfluous).  The name refers to the mangrove wood found there.  Six islands are in the group; Phi Phi Don, Phi Phi Ley, Biddah Nok, Biddah Nai, Yung, and Pai; total area is about 35 square kilometers.  They were incorporated into the national park in 1983.  Some of the interesting places to visit include.