Cardigan Island (Welsh: Ynys Aberteifi) is a small, uninhabited island lying north of Cardigan, Wales.Lying in the estuary of the River Teifi, it is known for its colony of grey seals.
Cardigan (Isle Of) – From ‘A Topographical Dictionary of Wales’ (1849)
CARDIGAN (ISLE OF), an extra-parochial district, in the hundred of Troedyraur, county of Cardigan, South Wales, 4½ miles (N.) from Cardigan. This is a small island, at the eastern side of the mouth of the river Teivy, and only separated from the main land by a narrow channel. It comprises about forty acres, and yields good pasturage for cattle and sheep, chiefly for the market at Cardigan.