Robert Asprin was the author or co-author of the MythAdventures and Phule's Company series of SF/fantasy novels, and was the editor of the Thieves' World series.
Yang the Nauseating was at Pennsic War at least as far back as Pennsic III and is credited with founding the Great Dark Horde, one of the largest and oldest households in the SCA.
Asprin, who died of natural causes, was to have been a Guest of Honor at Marcon, an SF convention in central Ohio, this coming weekend.
Rest in peace, Yang. We will miss you.