Allu are demons in Mesopotomian mythologies.
In Akkadian mythology, the Allu were a race of monstrous and faceless demons known for their appetite for sheer destruction and carnage.
They were born to Lilitu or one of her demon servants. When their father was about to die, they surrounded his bed waiting for the moment during which they could take their father's soul, impeding his travel to the Underworld, and making of him an errant spirit, feared by all living people.
In Sumerian mythology Allu was a demonic power.