House Costayne

House Costayne of Three Towers
Coat of arms	Quarterly; sable, a chalice argent; or, a rose sable
Seat	Three Towers
Head	Lord Tommen Costayne
Region	the Reach
Overlord	House Hightower

House Costayne of Three Towers is a noble house from the Reach, sworn to the Hightowers. Three Towers is located on the southern coast of the Whispering Sound.

They blazon their shield with quartered: a silver chalice on black, a black rose on gold. Their words do not appear in the text.

The Costayne House at the end of the third century

The known Costaynes during the timespan of the events described on A Song of Ice and Fire are:

• Lord Tommen Costayne, Lord of the Three Towers.

With unspecified familiar relationship with the lord of the house there is also:

• Aemon Costayne, a famous singer.

References in the books

Dunk & Egg

• Lord Costayne was on his way to partake in Lord Ambrose Butterwell's wedding festivities.
• The father of Lord Costayne fought for the Blackfyres during the Blackfyre Rebellion.
• The Costayne force that participated in the Battle of the Redgrass Field fought on the left of Daemon Blackfyre's host.
• Lord Costayne was married to the daughter of Lord Ambrose by his first wife.
• Lord Costayne was defeated at the Whitewalls Tourney by Ser Glendon Flowers.
• After the Second Blackfyre Rebellion was put down, a man in service to Lord Vyrwel claimed to have been one of Bloodraven's spies. He was promptly killed by a man in service to Lord Costayne.

A Song of Ice and Fire

• Aemon Costayne was among the seven singers that were selected to sing at Joffrey I's wedding.
• Ser Jaime made the point to Ser Loras Tyrell that, even if he did not know about Long Tom Costayne, he had served at the Kingsguard for sixty years.
• Samwell Tarly spots Three Towers as the Cinnamon Wind sails into Whispering Sound.
• House Costayne is a vassal house of House Hightower.