Dagular is a demon among the servants of the arch-fiends Astaroth and Asmodeus. Daguler is named in Mathers’ translation of the Sacred Magic of Abramelin the Mage. In other versions this demon’s name is given variously as Dagulez or Paguldez. A.G.H.
Belanger, Michelle. The Dictionary of Demon: Names of the Damneds. Llewellen Publications. 2010. ebook.