Dattatreya or Datta is a Hindu deity

Deity

A deity is a recognized preternatural or supernatural immortal being, who may be thought of as holy, divine, or sacred, held in high regard, and respected by believers....

 encompassing the trinity of Brahma

Brahma

Brahma is the Hindu god of creation and one of the Trimurti, the others being Vishnu and Shiva. According to the Brahma Purana, he is the father of Mānu, and from Mānu all human beings are descended. In the Ramayana and the...

, Vishnu

Vishnu

Vishnu is the Supreme god in the Vaishnavite tradition of Hinduism. Smarta followers of Adi Shankara, among others, venerate Vishnu as one of the five primary forms of God....

 and Shiva

Shiva

Shiva is a major Hindu deity, and is the destroyer god or transformer among the Trimurti, the Hindu Trinity of the primary aspects of the divine. God Shiva is a yogi who has notice of everything that happens in the world and is the main aspect of life. Yet one with great power lives a life of a...

, collectively known as Trimurti

Trimurti

The Trimurti is a concept in Hinduism "in which the cosmic functions of creation, maintenance, and destruction are personified by the forms of Brahmā the creator, Vishnu the maintainer or preserver, and Śhiva the destroyer or transformer," These three deities have been called "the Hindu triad" or...

. The name Dattatreya can be divided into two words - "Datta" (meaning given) and "Atreya" referring to the sage Atri

Atri

This article is about the sage named Attri. See also the gotra named Atri. For the Italian city, see Atri, AbruzzoIn Hinduism, Attri or Atri is a legendary bard and scholar and was one of 9 Prajapatis, and a son of Brahma, said to be ancestor of some Brahmin, Prajapatis, kshatriya and Vaishya...

, his physical father.

Various Hindu sects worship him differently. In the Nath tradition

Nath

The Sanskrit word nāthá or नाथ, is the proper name of a Hindu initiatory tradition and the word itself literally means "lord, protector, refuge"...

, Dattatreya is recognized as an Avatar

Avatar

In Hinduism, an avatar is a deliberate descent of a deity to earth, or a descent of the Supreme Being and is mostly translated into English as "incarnation," but more accurately as "appearance" or "manifestation"....

 or incarnation of Shiva

Shiva

Shiva is a major Hindu deity, and is the destroyer god or transformer among the Trimurti, the Hindu Trinity of the primary aspects of the divine. God Shiva is a yogi who has notice of everything that happens in the world and is the main aspect of life. Yet one with great power lives a life of a...

 and as the Adi-Guru (First Teacher) of the Adinath Sampradaya

Adinath Sampradaya

The Adinath Sampradaya was a sadhu sub-sect of the greater Nath tradition. Followers of this tradition were given Sannyasa diksha, thus renouncing householder life, and thereafter lived as naked sadhus. Believing that sadhus should live alone until they had attained the goal, they lived in caves,...

 of the Nathas.