Google Books – Cotgrave French and English Dictionary: Chastellenie : f. A Castle-wick, or Castleship; the Tenure or Honour of a Castleship ; the Estate, Jurisdiction, or Dignity of a Lord Castellain; a kind of Seigniory that’s held of some other than the King, or not directly of the Crown, and hath all (subaltern) Jurisdiction annexed unto it.
Re: chastellenie