William Eric Viking Hahne (born 19 April 1992[citation needed]) is a Swedish politician who was the Deputy Chairman of the party Alternative for Sweden.

From November 2014 to April 2015 Hahne represented the Sweden Democrats in the City Council of Stockholm Municipality.

Hahne was employed in 2010 as press secretary for the Sweden Democrats in the Riksdag but left the post in 2012, according to many because of an attention-grabbing debate article in Aftonbladet together with Gustav Kasselstrand in which the youth union took a stand against the parent party in the Israel-Palestine conflict.

[1] In November 2012, Hahne and Kasselstrand were again noticed in a debate article, this time in Dagens Nyheter where they criticized the mother party for the treatment of Erik Almqvist after the so-called "Järnrörsscandalen".

[4] At the launching of the party Alternative for Sweden in March 2018 Hahne was presented as its Deputy Chairman.