Carpiel: A demon from the Ars Theurgia said to serve the infernal king Barmiel. Through his association with Barmiel, Carpiel is connected with the south. He holds the rank of duke and rules over twenty ministering spirits. He is one of ten demonic dukes who serve Barmiel during the hours of the day. It is sometimes tempting to relate the names of demons to the words that they resemble, but there is no indication that Carpiel bears any resemblance to a carp.
SOURCE:
The Dictionary of Demons written by Michelle Belanger