The Red Book of Hergest calls these "Castell Hu" (= modern Cas-wis or Wiston) and "Llan y Hadein" (=Llanhuadain or Llawhaden).
[2] The three northeastern parishes of Llys y Fran, New Moat and Bletherston were Welsh-speaking during the 20th century.
As their names imply, the civil headquarters of the commotes were at Wiston and Llawhaden, and the latter the cantref's ecclesiastical centre, perhaps the seat of a bishop during the Age of the Saints.
[3] Dungleddy was formalised as a hundred by the Laws in Wales Acts 1535-1542: a small part was transferred to the hundred of Dewisland, and various fragments of church land (Llandissilio, Llanfallteg, Llangan, Crinow, Henllan, Grondre and western Llawhaden) were acquired from Cantref Gwarthaf.
The name continues in the present day as Daugleddau, a Church in Wales parish in the Diocese of St Davids, combining 13 former Anglican parishes of Pembrokeshire.