Valdo Marx

Troubadour from Cidaris mentioned in "The Last Wish," one of the fantasy tales in the eponymous short story collection by Andrzej Sapkowski (1993; first English edition 2007). Recurring Witcher bard/narrator/goofus Dandelion asks a djinn to make Marx die of apoplexy as soon as possible. It's not clear if this takes place, since the djinn opts to strangle Dandelion instead.