Vayu-Vata is the Avestan language

Avestan language

Avestan is an East Iranian language known only from its use as the language of Zoroastrian scripture, i.e. the Avesta, from which it derives its name...

 name of a dual-natured Zoroastrian divinity of the wind (Vayu) and of the atmosphere (Vata). The names are also used independently of one another, with 'Vayu' occurring more frequently than 'Vata', but even when used independently still representing the other aspect.

The entity is simultaneously angelic and demonic, that is, depending on the circumstances, either yazata

Yazata

Yazata is the Avestan language word for a Zoroastrian concept. The word has a wide range of meanings but generally signifies a divinity...

- "worthy of worship" - or daeva

Daeva

Daeva 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 , Baluchi dêw , Persian dīv , Kurdish dêw...

, which in Zoroastrian tradition is a demon. Scripture frequently applies the epithet "good" when speaking of one or the other in a positive context.

In Zurvanism

Zurvanism

Zurvanism is a now-extinct branch of Zoroastrianism that had the divinity Zurvan as its First Principle . Zurvanism is also known as Zurvanite Zoroastrianism....

 (Zurvanite Zoroastrianism, a now-extinct form of Zoroastrianism), Vata-Vayu represented two facets of the quaternary Zurvan. In this arrangement, Vata-Vayu represented "space" while the other two facets represent "time."

Vayu-Vata has Indo-Iranian roots, and has the same name in historical Vedic religion

Historical Vedic religion

The religion of the Vedic period is a historical predecessor of Hinduism. Its liturgy is reflected in the mantra portion of the four Vedas, which are compiled in Sanskrit. The religious practices centered on a clergy administering rites...

.