 The Old English form of "sark" "shirt" (related to Old Norse "serkr") is precisely "serċ, syrċ" > Middle English "serk", "serke", "sark" (through the Anglian variant).In ancient times, Sark was almost certainly occupied by the Unelli, the Gaulish tribe of the Cotentin peninsula.These people were subdued by the Roman Empire about 56 BC.