Athyras was an ancient Greek city in Thrace, located in the region of the Propontis. It was also the name of a river. It is thought to be on the site of the modern Turkish city of Büyükçekmece.
Athyra is the sixth book in Steven Brust's Vlad Taltos series, set in the fantasy world of Dragaera. Originally published in 1993, by Ace Books, it was reprinted in 2003 along with Orca in the omnibus The Book of Athyra. Following the trend of the Vlad Taltos books, it is named after one of the Great Houses and features that House as an important element to its plot.