House Estermont of Greenstone is a vassal house from the Stormlands that holds fealty to House Baratheon. Their seat is Greenstone, a castle located on the island of Estermont in Shipbreaker Bay. Their sigil is a dark green sea turtle on a field of pale green.

Known Members


Season 2

During the War of the Five Kings, House Estermont, along with most noble houses of the Stormlands, pledges support to Renly Baratheon's claim to the Iron Throne. Following the death of Renly, the Estermonts go over to Stannis and participate in the Battle of the Blackwater.[1]

Season 5

While sailing south from King's Landing to Dorne, Jaime Lannister asks the ship's captain if the island on the horizon is Estermont; he is corrected that it is actually Tarth.[2]

Behind the scenes

George R.R. Martin uses a turtle as his personal sigil, having kept turtles as pets when he was a child.[3]

In the audio commentary track for "Fire and Blood", D.B. Weiss revealed that they cut the flag for House Estermont because "we cut the turtle out, we didn't want to see a turtle."

In the books

In the A Song of Ice and Fire novels, Lady Cassana had many siblings including two brothers. The elder, Lord Eldon Estermont, is about 70 years old and head of House Estermont, and the younger, Ser Lomas Estermont, has a son, Ser Andrew. Ser Andrew Estermont had previously been Stannis’s squire for numerous years.

The first time Cersei Lannister became aware of her husband's infidelity was when they repaid a visit to the Estermonts. she was miserable the entire fortnight they spent with the Estermonts while Robert enjoyed hunting, hawking, drinking, and play fighting with his maternal uncles and male cousins. He also took to reconnecting and comforting a female cousin, whose father and husband died in the Siege of Storm's End and eventually spent the night with her. That same night, Jaime Lannister offered to kill Robert, but Cersei said she wanted him "horned" instead. She likes to think that was the night when her son Joffrey was conceived.

Following the Battle of Blackwater Bay, Lord Eldon bends the knee to King Joffrey, though some members of House Estermont remain loyal to Stannis.


  • {Lord Estermont}, former Lord of Greenstone. An ancient man. Old-fashioned and cautious.
  • Lord Eldon Estermont, Lord of Greenstone.
    • Ser Aemon Estermont, Eldon's son and heir.
      • Ser Alyn Estermont, Aemon's son.
  • Ser Lomas Estermont, in some sources Eldon's brother, in others - Eldon's son.
    • Ser Andrew Estermont, Lomas's son.
  • Lady {Cassana Estermont}, wife to Lord Steffon Baratheon and the mother of, Robert, Stannis, and Renly. Killed in a shipwreck during a storm in Shipbreaker Bay along with her husband.

With unspecified familiar relationship to the main branch of the house, there is also:

See also


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