Anglo Saxon Chronicles - 495AD - Cerdicesora
(Cerdic and Cynric)

495AD. This year came two leaders into Britain, Cerdic and Cynric his son, with five ships, at a place that is called Cerdicesora. And they fought with the Welsh the same day. Cerdic died this year, possibly from injuries sustained in the battle, and Cynric took over.

Cerdicesora breaks into two elements: Cerdices (Cerdic's — the possessive form of the leader's name as recorded in the Chronicles) and ora (shore, landing place). So the meaning is simply 'Cerdic's shore', commemorating the specific landing recorded in the Chronicles with a date. This is one of the rare cases where a personal name appears in a Saxon place name — but it records a historical event, not an ownership claim in the ordinary sense.

The name evolution runs as follows. With the original meaning lost, Cerdices at the front erodes, leaving Icesora. The ending ora softens to ore, giving Icenore at Domesday, and finally Itchenor today. Each step is a small and natural phonetic change; the chain as a whole is consistent and coherent.

Itchenor in West Sussex is the most geographically convincing identification for Cerdicesora. It sits at the western edge of what was then Ælle's Sussex territory — Chichester had been taken after the battle of Mearcrædesburnan stæðe in 485AD — making Itchenor the natural westward limit of Saxon-held coastline at the time. Landing here, Cerdic and Cynric were not entering hostile Sussex but pushing beyond it into what would become Hampshire and ultimately Wessex. The location fits the Chronicle's narrative of a progressive westward colonisation of the south coast exactly.

As with Cymensora and Shoreham, the significance of the identification is not just geographical but linguistic. The modern name Itchenor carries within it, compressed and worn smooth by fifteen centuries of use, the name of the West Saxon founder and the memory of the day he came ashore. It is one of the oldest datable place names in England.