House Dustin

House Dustin of Barrowton is a vassal house that holds fealty to House Stark of Winterfell. They control Barrowton, a settlement in the Barrowlands, north of Blazewater Bay.

Season 2
Whilst posing as a cupbearer to Tywin Lannister at Harrenhal, Arya Stark claims to be from Maidenpool, the seat of House Mooton. However, Arya is not able to identify House Mooton's sigil to Tywin. She admits to being from the North instead, claiming to be a stonemason's daughter from Barrowton. She describes House Dustin's sigil perfectly, convincing Tywin.

Tywin later criticizes Arya's pronunciation of "My lord." He says that she sounds high born but Arya counters that her mother served as a handmaid to Lady Dustin for many years and taught her how to speak properly.

In the books
In the Song of Ice and Fire novels, House Dustin are the rulers of Barrowton. They have a vassal house of their own, House Stout of Goldgrass. House Dustin is ruled by Lady Barbrey of House Ryswell, widow of Willam Dustin, who died at the end of Robert's Rebellion, killed by the Mad King's surviving Kingsguard at the Mountains of Dorne. At one time Barbrey hoped for a marriage to Brandon Stark, but this was dashed when he was instead betrothed to Catelyn Tully.