Seven Kingdoms
From Asoiaf
The Seven Kingdoms divided Westeros, but was unified by Aegon the Dragon during the Wars of Conquest. Robert Baratheon is the current King of the Seven Kingdoms.
Storm Kings
The Storm Kings ruled from Storm's End.
The last of the Storm Kings, Argilac the Arrogant, was defeated and slain by Orys Baratheon during the Wars of Conquest. As reward Aegon the Conquerer granted Argilac's castle, land and daughter to Orys. (GoT, App)