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House Costayne of Three Towers

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House Costayne of Three Towers is a noble house of the Reach, sworn to the Hightowers, whose arms quarter a silver chalice on black with a black rose on gold.

It is one of many minor southern houses that turn up in the realm's great episodes without ever standing at their centre: one name among others on a list of brides, one more banner among those raised in a rebellion.

Queen Candidates

When Queen Jaehaera Targaryen died, the realm was left with a young king and no queen. Lady Samantha Tarly, eager to tie the crown to the Reach, wrote directly to Aegon III proposing names of marriageable ladies.

Among the candidates she set down were girls of House Costayne, mixed in with those of other noble houses of the south.

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Blackfyre Rebellion

Decades later, the house took up arms for the side that ended up losing. When the Blackfyre Rebellion broke out, the Costaynes stood with Daemon Blackfyre rather than with the rightful king, Daeron II Targaryen, his own half-brother.

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Members

Family tree · 5 people · 2 unions

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Others in its story

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Domain

Seat

Three Towers · The Reach

Sworn to: House Hightower of the Hightower

Three TowersThe ArborBrightwater KeepDunstonburySunhouseUplands100 leaguesSee on the map
Seat: Three Towers · 100 leagues
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According to the Hielo y Fuego Wiki · Casa Costayne · 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 Costayne” (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 Costayne”
Region
anapioficeandfire.com/api/houses (Spanish from pipeline/casas/regiones.json)
Seat
«Three Towers» → data/lugares.json by name + type + region
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 Costayne of Three Towers