House Vance of Atranta is one of the two largest branches of House Vance. The other large branch is House Vance from Wayfarer's Rest.
House Vance were amongst the petty kings in The Riverlands before they were taken over by House Durrandon. They then rose up alongside House Tully against Iron King Harren Hoare in favour of King Aegon I Targaryen during the War of Conquest.
A Storm of SwordsEdit
Lord Norbert Vance sends his sons to Riverrun after the outbreak of the War of the Five Kings. Whilst there they become fast friends with Lord Edmure Tully after he starts avoiding his sister, Lady Catelyn Stark. All of Norbert's sons survive the infamous Red Wedding, although Catelyn sees a Vance getting hamstrung by Black Walder Frey.
A Feast for CrowsEdit
Ser Hugo Vance, Norbert's second son, rides from King's Landing to help lift the siege of Riverrun. He had presumably been sent to the capital to bend the knee on behalf of his father. He carries the standard of the Kingsguard when Ser Jaime Lannister arrives at Castle Darry.
Norbert is one of the riverlords assembled outside the gates of riverrun, aiding House Frey and House Lannister in the siege. After Jaime arrives he sits on the war council and offers to treat with Ser Brynden Tully, the castellan of Riverrun, because they squired together at Darry in their youth.