What is "abezethibou"

Abezethibou, or Abezethibod, is a demon and fallen angel described in the pseudepigraph Testament of Solomon. He followed Beelzebub upon his fall from heaven, and became an important demon in hell. However, after his treason, he is left with one red wing. He later travelled to Egypt where he hardened the heart of pharaoh and his advisors, and convinced them to pursue the fleeing Israelite slaves. In doing so, he drowns along with the army in the Red Sea, and becomes trapped in a pillar of water, though Beelzebub claims he will return for conquest.