Cisse-ceaster

According to the Old English Dictionary:

Cisse-ceaster

gen. -ceastre; f. [Flor. Cissaceaster: Sim. Dun. Cissacestre] Cissa's city, CHICHESTER, Sussex; Cissæ castellum, Cicestria in agro Sussexiensi :-- Hergodon hie upon Súþ-Seaxum neáh Cisseceastre they harried on the South-Saxons near Chichester, Chr. 895; Erl. 93, 27. To Cisseceastre at Chichester, L. Ath. i. 14; Th. i. 208, 3. cisse-ceaster