From Wikipedia: The rambutan (taxonomic name: Nephelium lappaceum) is a medium-sized tropical tree in the family Sapindaceae, and the fruit of this tree. It is native to Malaysia, Indonesia, The Philippines, Sri Lanka and Southeast Asia, although its precise natural distribution is unknown. It is closely related to several other edible tropical fruits including the Lychee, Longan, and Mamoncillo. It is believed to be native to the Malay Archipelago, from where it spread westwards to Thailand, Burma, Sri Lanka and India; eastwards to Vietnam, the Philippines and Indonesia. The name rambutan is derived from the Malay word rambut, which literally means hairy caused by the 'hair' that covers this fruit, and is in general use in Malay and Filipino.