The embodiment of Brahma, Vishnu and Shiva in one deity.
His parents are Atri and Anasuya.
Dattatreya is the composer of the Avadhuta Gita.
See also Guru Charitra.
To read about Dattatreya visit
http://sushmajee.com/biographies/bio-D/dattaatreya-1.htm
To read the Avadhuta Gita visit
https://www.astrojyoti.com/avadhootagita.htm
Read about Dattatreya’s 24 gurus here
http://sushmajee.com/bhagvatjee/kathaa/skandh11/6-avadhoot-1.htm