 The name of the hamlet is assumed to derive from the 5th century saint, Illtyd, to whom the parish church is now dedicated.Church records date back to 1674, and the parish was in the Hundred of Kilgerran (formed in 1536) even though it was in the Cemais administrative area.The region was occupied by the Normans in the 12th century, who built castles at several strategic locations in the area; the clear remains of a motte and bailey exists at Castell Penyrallt (or Castell Pen-yr-allt).