Delaval is the surname of a family of gentry/aristocracy in Northumberland, England, from the 11th century to the 19th century. Their main estate was the manor of Seaton Delaval. The 18th century Delavals are noteworthy for their colourful lifestyle, for the magnificent Seaton Delaval Hall and for the development of the little seaport of Seaton Sl...
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