|Died||In 299 ᴀᴄ, at Winterfell|
A Clash of Kings (appears)|
A Dance with Dragons (mentioned)
Gelmarr, also known as Gelmarr the Grim, is an ironborn raider.
A Clash of Kings
Gelmarr is a part of Theon Greyjoy's crew when it raids the Stony Shore and captures Winterfell. When Bran and Rickon Stark go missing, Gelmarr is a part of the search party. Gelmarr, along with Aggar and Gynir, goes with Theon and Reek to the mill at the Acorn Water, where he kills the miller's wife with his axe.
Gelmarr dies at night after the search party returns to Winterfell with the bodies of two children. Gelmarr falls down some steps and breaks his neck. Aggar and Gynir are also found dead in the following days. Although he knows Reek was responsible for the murders, Theon condemns Farlen for the deaths and personally executes the kennelmaster.
A Dance with Dragons
As more men turn up mysteriously dead in Winterfell Theon Greyjoy thinks to himself that it all seems so familiar, like a mummer show that he had seen before. Except this time the mummers have changed, Roose Bolton is playing the part that Theon once played and the dead mean are playing the parts of Aggar, Gynir Rednose, and Gelmarr the Grim.