[Excerpt from Encyclopaedia Populus: A Compendium of the Peoples, Personalities, and Practices of Ylan (5th ed.), by Miriam Busslewickett]
The term “Rhune” refers to an ancient human king who was enslaved by elves millenia ago. All modern-day humans are understood to have descended from the House of Rhune, and accordingly the term “Rhune” is sometime used to refer to humans generally.
See also Races