This paper attempts to show that the Shianbei word for ‘paper’ was *qaɣVdu, which is cognate to Written Mongolian qaɣudasu ‘tree bark, sheet of paper’, and that *qaɣVdu was subsequently borrowed into other languages as Sogdian kāγaδā, Persian kaġad, kaġid, Old Turkic qaɣat/qaɣaz and Turkish kâğĭd. The etymology of Greek Séres “China” is also discussed.