The "Blackfyre pretenders" refer to a series of claimants to the Iron Throne of Westeros who descended from Daemon Blackfyre, a legitimized bastard of King Aegon IV. After Daemon's failed rebellion, his descendants continued to assert their claim, leading to several conflicts known as the Blackfyre Rebellions. These pretenders, including figures like Aegon Blackfyre and Daemon Blackfyre II, sought to challenge the ruling Targaryens. Their attempts to seize power were marked by political intrigue and battles, ultimately failing to establish a lasting dynasty, but they left a significant impact on the history of Westeros.