Anderitos is generally identified with the Saxon shore fort at Pevensey. The name derives from a British prefix ande "great" and ritu 'ford' giving the meaning 'great fords'.

The Old English called the fort Andredesceaster and transferred the name to the forest as Andredesleage later Andredes Weald, the Weald. The Notitia Dignitatum records a numerus of Abulci, raised around Avila in Spain, here.