Planetos

Etymology
+ -os, a suffix used in the series in the names of continents, e.g. Westeros, Essos, and Sothoryos.

Proper noun

 * 1)  The unnamed fictional planet which serves as the setting for the ' novel series and its television adaptation '.
 * 2) * 2016, Patrice A. Loar, "'On the Cusp of Half-Remembered Prophecies': Interpreting Prophecy in George R. R. Martin's A Song of Ice and Fire", thesis submitted to the University of New Orleans, page 4:
 * However, the comet’s presence is not limited to the sky over Drogo’s pyre, and winter is coming to all of Planetos;