Riduna
Riduna, æ, f. , île entre la Gaule et la Bretagne : Anton.
RIDUNA
RIDUNA one of the islands off that part of the Gallic coast which was occupied by the Armoric states. As the Marit. Itin. mentions Caesarea (Jersey), Sarnia (Guernsey), and Riduna, it is concluded that Riduna is Aurigny or Alderney off Cap de la Hague.
[G.L]