Nebiros

The demon Naberius or Nebiros was first mentioned by Johann Weyer in 1583. He is supposedly the most valiant Marquess of Hell, and has 19 legions of demons under his command. He makes men cunning in all arts (and sciences, according to most authors), but especially in rhetoric, speaking with a hoarse voice. He also restores lost dignities and honors, although according to Johann Weyer, he procures the loss of them. In appearance, he resembles the Ancient Greek hellhound Cerberus.

Nebiros in The Case of the Toxic Spell Dump
Nebiros, a field-marshal and inspector-general of the Judeo-Christian Descending Hierarchy, was known to have been living in the New World for centuries, as of 1993. He was more evil than the indigenous Aztecian deity Huitzilopochtli, but was not proactively engaged in mischief.