Big Walder Frey

Big Walder Frey is a grandson of Lord Walder Frey. He is the son of Ser Jammos Frey, Walder Frey's 13th son and 2nd by his fourth wife Alyssa Blackwood, and Sallei Paege. He is called Big Walder as he is 52 days older then his cousin Little Walder Frey, the son of Merrett Frey, though Little Walder has grown half a foot taller and is ahead in the line of succession.

As part of the terms for Robb Stark to cross the Twins, Little Walder and Big Walder are sent to be fostered at Winterfell. Big Walder mentions Little Walder is ahead in the line of succession, and when Little Walder says neither of them will be Lord of the Crossing Big Walder says he will. They make friends with Rickon Stark, though Bran doesn't like them. When they hit the quintains Bran thinks though Little Walder strikes the harder blow, Big Walder sat his horse better. Little Walder begins mocking Hodor, Big Walder joining in slightly, however Luwin stops them. Big Walder admits what was happening, apologizes, and has the grace to look abashed, his cousin only looking peevish.

When Meera and Jojen Reed arrive Little Walder mutters insults at the Crannogmen to his cousin, the Freys land borders the Neck and the Freys have a feud with the Crannogmen.

When news arrives of the death of their half-uncle Ser Stevron Frey, heir to the Twins, the Walders show no sadness at his passing, Big Walder saying he was old and always saying he'll be tired, while Little Walder laughs. Thet are more interested in how this effects the line of succession for the Twins, Big Walder saying the new heir is Stevron's eldest son Ryman Frey, though claims he'll be lord. When Maester Luwin tells them of for being uncaring Little Walder says they're very sad unconvincingly.