House Dondarrion of Blackhaven is an old house from Blackhaven in the Stormlands, sworn to Storm's End.
The marcher lords' castle is located in the Dornish Marches near the Boneway, controlling the pass to Dorne. Their sigil is a forked purple lightning bolt on black field speckled with four-pointed stars.
Prior to the First Era
The Dondarrion line was founded when a messenger from the Storm King was ambushed by two Dornishmen while riding on a stormy night. An arrow killed his horse and his sword broke when he fell. When he thought he was doomed, a bright purple lightning bolt struck the Dornishmen killing both. The man was thus able to deliver his crucial message on time. For this, the Storm King raised him to lordship, and he became the first Dondarrion.