Daeva

Daeva (daēuua, daāua, daēva) in Avestan language meaning "a being of shining light", is a term for a particular sort of supernatural entity with disagreeable characteristics. Equivalents in Iranian languages include Pashto dêw (Uber ghost, demon, giant), Baluchi dêw (giant, monster), Persian dīv (a demon, an ogre, a giant), Kurdish dêw (giant, monster). The Iranian word is borrowed into Urdu as deo, in Armenian as dew and Georgian as devi. In the Gathas, the oldest texts of the Zoroastrian canon, the daevas are 'wrong gods' or 'false gods' or 'gods that are (to be) rejected'. This meaning is – subject to interpretation – perhaps also evident in the Old Persian 'daiva inscription' of the 5th century BCE. In the Younger Avesta, texts of the Zoroastrian canon, the daevas are noxious creatures that promote chaos and disorder. In later tradition and folklore, the dēws (Zoroastrian Middle Persian; New Persian divs) are personifications of every imaginable evil.

Winchester guys said:

Zoroastrian, very very old scholl like 2000 years before Christ.

Daeva translates to "demon of darkness". 

Zoroastrian demons, they're savage, animalistic. Nasty attitues, kind of like demonic pit bulls.

 They have to be summoned, conjured. 

It is pretty risky business too. They tend to bite the hand that feeds them. And the arms, torso...

Nobody knows how they look like. Nobody sees them for a couple of millenia. 

Sigil for Daeva