[ kas-tl-ey-nee ]
/ ˈkæs tlˌeɪ ni /

noun, plural cas·tel·la·nies.

the rank, office, or jurisdiction of a castellan.
the land belonging to a castle.

Origin of castellany

Middle English word dating back to 1325–75; see origin at castellan, -y3 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for castellany