Wikipedia has this to say about the river:
History
The earliest known reference to the River Coquet is found in the 8th Century Ravenna Cosmography, where it is known as Coccuueda.[52] Bede referred to Cocuedi fluminis.[53] This can be roughly translated to 'Red River', perhaps reflecting the red porphyritic pebbles found here in large numbers.[54]
The area provides the background to William Gibson's poem The Sailor or the Coquet Cottage. This and other poems, some in the Scottish dialect, were published in 1828.[55] Copies of this very rare book are in the British Library and also in the Duke of Northumberland's library at Alnwick Castle.[citation needed]
