What is "nantcribba"

' Nantcribba' is a township in the parish of Forden in the historic county of Montgomeryshire and now in Powys It is also the site of Nantcribba Castle which was built by the Corbett, Barons of Caus, of Caus Castle in Shropshire. To the south of the Castle site was Nantcribba Hall, which was owned by the Devereux family and the Marquises of Hereford. In the 19th century Nantcribba became part of the Leighton Hall estates.