High Quality Content by WIKIPEDIA articles! Seres was the ancient Greek and Roman name for the inhabitants of the northwestern part of modern China, (in other words modern Xinjiang). It meant "of silk," or people of the "land where silk comes from." The country of the Seres was Serica. The name is thought to derive from the Chinese word for silk, si. It is itself at the origin of the Latin for "silk", s r c . The first accounts of the Seres, of disputed authenticity, seem to be those by the Greek historian Ctesias in the 5th century BC, in which he refers to them as "people of portentous stature and longevity."