William Eric Viking Hahne (born 19 April 1992) is a Swedish politician who was the Deputy Chairman of the party Alternative for Sweden. He was Deputy Chairman of the Sweden Democratic Youth from September 2011 to September 2015. From November 2014 to April 2015 Hahne represented the Sweden Democrats in the City Council of Stockholm Municipality. At the launching of the party Alternative for Sweden in March 2018 Hahne was presented as its Deputy Chairman. In March 2020 he resigned after it was revealed that he sold surgical masks for 249 SEK each.