|House Borrell of Sweetsister|
|Coat of arms|| A white spider crab, on a grey-green field|
(Vert-cendrée, a spider crab argent)
|Seat||Breakwater in Sisterton|
|Current Lord||Godric Borrell|
|Region||Three Sisters, Vale of Arryn|
|Title||Lord of Sweetsister|
House Borrell of Sweetsister is a noble house from the Vale ruling over Sweetsister, an island of the Three Sisters, and its port town, Sisterton. Their castle is Breakwater in Sisterton. House Borrell's titles include Lord of Sweetsister, Shield of Sisterton, Master of Breakwater Castle, and Keeper of the Night Lamp. They are sworn to House Sunderland, who also reside in Sisterton.
The ancestors of House Borrell were pirate kings until the Starks came down on them with fire and sword. For five thousand years the Borrells have had "the mark", a sort of webbing between the three middle fingers of their hands.
During the Dance of the Dragons, Prince Jacaerys Velaryon gained Houses Borrell and Sunderland for the blacks during his visit to Sisterton. The Sunderlands dragged the Three Sisters into two of the Blackfyre Rebellions, for which the Sistermen suffered grievously.
A Dance with Dragons
House Borrell at the end of the third century
The known Borells during the timespan of the events described in A Song of Ice and Fire are:
- Lord Godric Borrell, Lord of Sweetsister.
- His granddaughter Gella, and another unnamed granddaughter with the distinctive finger-webbing of the Borrells.