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House Goodbrother of Hammerhorn

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House Goodbrother of Hammerhorn is one of the great houses of Great Wyk, a vassal of House Greyjoy and one of the wealthiest families in the Iron Islands, its riches drawn from the mines its people work rather than the iron its men reave from the sea.

Its blood has branched into several lesser houses scattered across the island, a mark of a name spread wide and a standing few other ironborn clans can match.

Lords of Hammerhorn

Hammerhorn appears on no map of the Iron Islands, yet the weight of its lords is felt all the same: the Goodbrothers rank among the most powerful houses of Great Wyk, sworn like every other ironborn clan to House Greyjoy.

Their arms show a black warhorn banded in gold on a field of red — a call to war that sits oddly with a fortune built not on raiding, but on the mines worked in their own ground.

Three branches have grown from Hammerhorn's stock: the Goodbrothers of Orkmont, of Lago del Cadáver, and of Fosa. Today Gorold Goodbrother rules as Lord of Hammerhorn, with Greydon Goodbrother as his heir.

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Leo Costayne's Campaign

During the regency of Aegon III, the coasts of the Westerlands suffered the ironborn's usual raids. Lady Johanna, Lady of Casterly Rock, did not settle for building up defenses: she persuaded Ser Leo Costayne to carry the war to the Iron Islands themselves.

The reprisal fell on Great Wyk as well, and among the dead of that campaign was Lord Goodbrother himself, head of the house. Hammerhorn paid with its lord's life for its men's habit of living off other men's sea.

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Domain

Sworn to

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Sworn houses (3)

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Cadet branches

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According to the Hielo y Fuego Wiki · Casa Goodbrother de Cuernomartillo · 2026-07-30

Images remain the property of their authors and are published under the licence of the wiki that hosts them; each one links its page.

Where each datum comes from
English name
anapioficeandfire.com/api/houses
Spanish name
hieloyfuego.fandom.com — “Casa Goodbrother de Cuernomartillo” (the wiki declares its English name in {{Interlinks}} and only one house bears that surname)
Arms (English)
anapioficeandfire.com/api/houses. Note: the API’s heraldry comes from The Citadel (westeros.org), which docs/canon.md §2 classes as SEMI-CANON
Arms (Spanish)
hieloyfuego.fandom.com — “Casa Goodbrother de Cuernomartillo”
Region
anapioficeandfire.com/api/houses (Spanish from pipeline/casas/regiones.json)
Allegiance
anapioficeandfire.com/api/houses (overlord field)
Current lord
anapioficeandfire.com/api/houses — the fifth book’s state (the API froze in 2015), NOT the show’s
Canon
no members on screen at gameofthrones.fandom.com: books only

Entry written on .

House Goodbrother of Hammerhorn