Camulodunum *camulo|dunon 'fort of Camulos (the war God)',Colchester
Canonium *canon|ion 'reedy place' Kelvedon
Caesaromagus caesar|o|*magos 'Caesar's market' Chelmsford.
Othona etymology unknown. Bede gives Ythancaestir, Bradwell
Londinium
etymology unknown.