Herdaz is a kingdom on Roshar. It is located to the north of Jah Keved, and north and leeward of Alethkar. Its northern coast is on the Reshi Sea and the Steamwaster Ocean. Its inhabitants are known as Herdazians.
Herdazians are noted for their boastfulness as a cultural trait.
There was intermixing between the Parshendi and Herdazians long ago. One sign of this is the stone carapace on Herdazian fingernails. They use sparkflickers to start fires with these dark, crystalline fingernails and some kind of oil, which makes bursts of flame in the air. They also wear sparkflickers as a kind of ornament without real martial application aside from their more practical use. For example, Havarah, Dalinar's bridge lord - of mixed descent - did not wear a sparkflicker.