https://en.wikipedia.org/wiki/Alt-right#Coining_of_the_term
Coining of the term
In November 2008, Paul Gottfried addressed the H. L. Mencken Club about what he called "the alternative right".[28] In 2009, two more posts at Taki's Magazine, by Patrick J. Ford and Jack Hunter, further discussed the alternative right.[29] The term, however, is most commonly attributed to Richard B. Spencer, president of the National Policy Institute and founder of Alternative Right.[3][30]