"at Aber Daugleddyf"
Pembroke Castle overlooking the River Cleddau
Creative Commons Attribution Share AlikePembroke Castle overlooking the River Cleddau - Credit: Chris Downer

Translated literally, Aber Daugleddyf means ‘the Mouth of the Two swords’. It refers to the two Pembrokeshire rivers known as the Eastern Cleddau (not Cleddyf) and the Western Cleddau. They unite at Picton Point to form the River Cleddau, which enters the sea at Milford Haven. The name for Milford Haven in modern Welsh is Aberdaugleddau.