Barbrey Dustin

Barbrey Ryswell is an unseen character mentioned in the second season. Barbrey Ryswell is a member of House Ryswell by birth and House Dustin by marriage.

Season 2
Arya Stark lies that her mother was a hand maid to Lady Dustin.

In the books
In the A Song of Ice and Fire novels Barbrey Ryswell is the widow of Lord William Dustin and the head of House Dustin.