As far as I know, the umber hulk is a D&D original. It's one of those combination monsters, in this case part nasty bug-faced creature and part bar bouncer, as can be clearly seen from the illustration from the
AD&D Monster Manual below.
This is the umber hulk wall hanging. It has two sets of eyes, which can be disorienting to those who look upon it.
The compound eyes are easier to see when the simple eyes are missing:
The original drawing: