AttestedCorsula at position 275 in the Ravenna Cosmography

Where:  Probably Walney Island, Cumbria, off Barrow-in-Furness, around SD1868, listed as the first (and apparently southernmost) of ‘various islands set in the western ocean’.

Name origin:  A diminutive of Latin corsae ‘outer strip in the moulding about a door’, derived from Greek κορση ‘temple, side of forehead’, would be an excellent fit to the shape of Walney Island.

Notes:  The suggestion by Rivet & Smith that Corsula was corrupted from insula ‘island’ is unnecessary, but the link with carse ‘swamp’ suggested by Richmond & Crawford remains possible; compare Welsh cors, Latin carex, etc, from PIE *kars- ‘to rub, to card wool’.  If the succeeding name Mona really belonged to Anglesey, maybe Corsula should be sought further south, for example at Holy Island, Anglesey's little outlier, but that seems unlikely.

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