 His theory is based on the early medieval Latin records mentioning "Sargia", but many Islands more or less close to Sark have a Latin name ending with "-gia", such as "Angia" (Channel Island), Oye-Plage (Pas-de-Calais, "Ogia" 8th century) and Île-d'Yeu (Vendée, former "Augia").Later records all mention "Serc-" and not "*Sark", that seem to result from a later anglicising of the /er/ group (compare French "merveille" > English "marvel"; French "Clerc" / English "clerk", "clark" cf.Clark).