In his 1631 treatise Historiae naturalis et medicae Indiae orientalis, Dutch physician and explorer Jacobus Bontius wrote, of a tribe he’d encountered in the jungles of what is now Indonesia, that “the Malays informed him that the X could talk, but preferred not to, lest they be compelled to labor.”*
Bontius’ mention of X was the Western world’s first introduction to the name of this tribe, a word that passed from Dutch to Portuguese to English and is still used today in slightly modified form – ironically, even speakers of modern Malay and Indonesian use the European corruption of the name, even though its etymology lies in Old Malay.
Who are the X?
*Considering Bontius was there as part of a Dutch East India Company expedition, this was probably a very good idea.