DHASSA — free holy city in the Lendour Mountains; seat of the prince-bishops of Dhassa, presiding from Cathedral of St. Andrew.
EASTMARCH — county in northeast Gwynedd.
EIRIAN RIVER — principal river of Gwynedd, extending northward from the sea to Rhemuth and beyond.
FORCINN BUFFER STATES — loosely confederated group of independent principalities, nominally under the over-lordship of the Hort of Orsal (who is also Prince of Tralia), the others being the Duchy of Joux, the Grand Duchy of Vezaire, and the Principalities of Logreine, Thuria, and Andelon.
FURSTÁNAN — Torenthi port town at the mouth of the Beldour River, and location of the Deryni Abbey of Saint-Sasile.
GRECOTHA — site of Gwynedd’s great university, and also St. Luke’s Cathedral.
GWYNEDD — principal kingdom of the Eleven Kingdoms, seat of the Haldane kings.
HALLOWDALE — village on the Molling River, scene of the burning of Deryni.
HAUT EMERAUD — equestrian stud facility of Oisín Adair.
HORTHÁNTHY — summer residence of the Hort of Orsal.
HOWICCE — kingdom linked with the Kingdom of Llannedd, southwest of Gwynedd.
INCUS DOMINI — the Anvil of the Lord, headquarters of the Knights of the Anvil, a Deryni order partially derived from fled Knights of St. Michael after the dissolution of that order.
JÁCA — sovereign principality, one of the Forcinn States.
JOUX — Torenthi duchy.
KHELDOUR — ancient principality in northern Gwynedd.
KIERNEY — earldom in northwest of Gwynedd, a secondary holding of the Dukes of Cassan.
KING’S LANDING — barge station on the River Eirian, just north of Rhemuth.
LAAS — ancient capital of Meara.
LENDOUR — earldom north of Corwyn.
LLANNEDD — kingdom linked with the Kingdom of Howicce, southwest of Gwynedd.
LORSÖL — duchy in Torenth, famous for its carpets.
MARLEY — earldom in northeast Gwynedd.
MEARA — formerly independent principality west of Gwynedd, now a province of Gwynedd.
MOLLING RIVER — eastern tributary of the River Eirian, joining it at Rhemuth.
MOLLINGFORD — market town on the Molling River, near Hallowdale.
MOORYN — former sovereign principality in the southeast of Gwynedd, divided by Festil I into the Duchies of Corwyn, Carthmoor, and numerous smaller earldoms and baronies.
MORGANHALL — manorial seat of the Morgan family.
NUR HALLAJ — sovereign principality sometimes regarded as one of the Forcinn Buffer States.
NUR SAYYID — great university in R’Kassi.
NYFORD — capital of Carthmoor; ancient market town and port; site of St. Joseph’s Cathedral.
ORSALIA — ancient name of part of Trailia, whence derives the title «Hort of Orsal».
PLADDA — manor house of Coroth, nestled in a curve of the Duncapall River, bordering Tendal lands.
PURPLE MARCH — vast plain in the north-central part of Gwynedd.
RATHARKIN — provincial capital of Meara.
RHANAMÉ — great Deryni university and seminary in R’Kassi.
RHEMUTH — capital of Gwynedd.
RHEMUTH CASTLE — seat of the Haldane Kings, and center of Gwynedd’s government.
RHENDALL — earldom in northeast Gwynedd.
RHENDALL MOUNTAINS — mountain chain encompassing Rhendall.
R’KASSI — kingdom east of Gwynedd and south of Torenth, famous for its horses.
RUNDEL CASTLE — an hour’s ride from Culdi.
SAINT-SASILE, ABBEY OF — all-Deryni monastic establishment in Furstánan, at the mouth of Torenth’s River Beldour.
TENDAL — barony of Corwyn.
TORENTH — principal kingdom east of Gwynedd.
TORTUÑA — Tralian port across the straits from Horthánthy.
TRALIA — more recent name of the sovereign principality ruled by the Hort of Orsal.
TRANSHA — small border earldom in northwest Gwynedd.
TRE-ARILAN — country seat of the Arilan family.
TRURILL — earldom between Gwynedd and Meara.