The manor of Aspatria is part of the ancient barony of Allerdale below Derwent. Awarded by Ranulph de Meschines, grantee of the whole of Cumberland from William the Conqueror, to Waltheof, son of Gospatrick, Earl of Dunbar, from whom the obsolete name of Aspatrick, may have been derived. Upon the division of the estates of William Fitz Duncan, and his wife Alice de Romney, among their three daughters, the manor passed to Alice the youngest. However Alice died without issue and the estates passed to an elder sister who had married into the Lucy family. The latter family terminated in a female heir Maud de Lucy. She married Henry Percy, the first Earl of Northumberland, who received the whole of her estates. It remained in this family through eleven generations before passing by the marriage of Lady Elizabeth, sole daughter and heiress of Josceline Percy to Charles Seymour, sixth Earl of Somerset. In recent times it again passed by a female heir to the Wyndham family, from whom it has descended to Lord Leconfield and now Lord Egremont.