|House Grimm of Greyshield|
|Coat of arms|| An iron escutcheon with silver studs on a grey-green field strewn with longships proper|
(Vert-cendrée semé of longships proper, an escutcheon cendrée platé)
|Current Lord||Guthor Grimm|
|Region||The Reach, the Shield Islands|
|Title||Lord of Greyshield|
Neither their arms nor their words appear in the books, but according to semi-canon sources they blazon their shield as an iron escutcheon with silver studs on a grey-green field strewn with longships proper.
A Feast for Crows
The Shield Islands are a considerable sea strength and are the first line of defense when the ironborn try to sail up the Mander to sack the wealth of the Reach. Hotho Harlaw reports that Lord Guthor Grimm's septon decided the gods had spoken and surrendered the castle Grimston after Ser Harras Harlaw defeated seven men. After the conquest of the Shield Islands, King Euron Greyjoy gives Greyshield to Harras. Lord Grimm is kept a prisoner of the ironmen at Grimston according to the tidings that reach King's Landing.
House Grimm at the end of the third century
The known Grimms during the timespan of the events described in A Song of Ice and Fire are:
- Lord Guthor Grimm, Lord of Greyshield. Held captive in his own keep, now ruled by Ser Harras Harlaw.