
White Harbor is a large harbor town south of Winterfell where the White Knife river opens into the sea. The castle and town has more contact with the southern part of the realm than any other place in the North, and so the Manderlys follow the seven-sided Faith and employ more knights than other houses of the region. White Harbor itself was built by King Jon Stark after driving off seaborne raiders from the east.
Lord Manderly is extremely fat, moreso than even his sons. His he has two sons: his heir, Ser Wylis, and Ser Wendel.
Lord Manderly was intent on marrying Lady Hornwood but when the Bastard of Bolton forced her to marry him and left her to starve to death, Lord Manderly sent forces into the Hornwood lands, occupying them in the name of protecting the Hornwood interests even after Ramsay Snow was apparently killed. When Ser Rodrik Cassel called the levies to deal with Theon Turncloak at Winterfell, Lord Manderly sent barges packed with knights and siege equipment, but he himself remained at White Harbor.
Lord Manderly’s heir, Ser Wylis, was a captive of the Lannisters until freed in the taking of Harrenhal by the forces under Bolton. He was left to hold a rearguard and was once again captured, this time by forces under the command of Ser Gregor Clegane. Ser Wendel accompanied the northman host to the Twins and was killed in the Red Wedding.