What is "knockgraffon"

Knockgraffon ( or also Cnoc Rath Fionn meaning "Hill of the fort of Fionn") is a townland in the civil parish of same name in County Tipperary, Ireland The civil parish lies in the barony of Middle Third. It is also part of the ecclesiastical parish of New Inn & Knockgraffon in the Roman Catholic Archdiocese of Cashel and Emly. Interesting features include a fine Motte, a church and a castle.