sentences:  The inlet was originally known as "Porthiscoed" ("harbour below the woods"), which, as Portskewett, later became the name of a nearby village.Mathern was originally known as "Merthyr-Tewdrig" ("burial-place of Tewdrig"), after the martyrdom of St. Tewdrig, king of Gwent and Glywysing.According to the Book of Llandaff, Tewdrig (or Tewdric) was wounded at Tintern around the year 630, after fighting the invading Saxons with his son Meurig ap Tewdrig.