title: Deio ab Ieuan Du
text: # Deio ab Ieuan Du
  
  Deio ab Ieuan Du (fl. 1460–1480) was a Welsh language poet from Ceredigion, west Wales.
  
  Deio composed eulogies to the nobility of the area, including Gruffydd Fychan, a supporter of Jasper Tudor.
  
  His works were edited in 1992 by A. Eleri Davies along with those of Gwilym ab Ieuan Hen.
  
  