Charles V divided his lands in two, giving his brother his Austrian lands and the title of Holy Roman Emperor, and his son Philip II of Spain, in addition to Spain, his colonial empire, the Low Countries, the Franche-Comté, Milan and Naples. Please see Albrecht Classen’s essay on The Reign of Charles V.
Editors. "Abdication of Charles V, Holy Roman Emperor". The Literary Encyclopedia. First published 02 December 2007
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4162, accessed 22 May 2015.]