The Bohemian Diet deposes Ferdinand and, on the 26th, elects Frederick V, the Elector Palatine, King of Bohemia (he is crowned in October). Frederick V, son-in-law of James I of England, is the head of the Protestant Union and the leading Calvinist prince. He is to become known as 'the Winter King', because his effective reign only lasts the winter, and he loses his throne to Emperor Ferdinand II the following year.
Editors. "Elector Palatine chosen as King of Bohemia by rebelling Protestants". The Literary Encyclopedia. First published 10 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2122, accessed 09 October 2015.]