Pyrrho (ca. 360 BC - ca. 270 BC), a Greek philosopher from Elis, was in antiquity credited as being the first skeptic philosopher and inspiration for the school known as Pyrrhonism founded by Aenesidemus in the 1st century BC. Wikipedia
The definitive Wikipedia entry for Pyrrho. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Pyrrho