As I see this, close to Advaita Vedanta but doesn't go far enough into Absolute Monism. But Mahayana Buddhism goes in further in dispensing with the idea of "God" altogether. From Wikipedia:
Hinduism[edit https://en.wikipedia.org/w/index.php?title=Henotheism&action=edit§ion=3] Further information: Hindu views on monotheism https://en.wikipedia.org/wiki/Hindu_views_on_monotheism and History of Hinduism https://en.wikipedia.org/wiki/History_of_Hinduism To what is One They call him Indra, Mitra, Varuna, Agni, and he is heavenly-winged Garutman. To what is One, sages give many a title. — Rigveda https://en.wikipedia.org/wiki/Rigveda 1.164.46 Transl: Klaus Klostermaier https://en.wikipedia.org/wiki/Klaus_Klostermaier[12] https://en.wikipedia.org/wiki/Henotheism#cite_note-12[13] https://en.wikipedia.org/wiki/Henotheism#cite_note-13 Henotheism was the term used by scholars such as Max Müller https://en.wikipedia.org/wiki/Max_M%C3%BCller to describe the theology of Vedic religion https://en.wikipedia.org/wiki/Historical_Vedic_religion.[14] https://en.wikipedia.org/wiki/Henotheism#cite_note-max-14[2] https://en.wikipedia.org/wiki/Henotheism#cite_note-taliaferro78-2 Müller noted that the hymns of the Rigveda https://en.wikipedia.org/wiki/Rigveda, the oldest scripture of Hinduism, mention many deities, but praises them successively as the "one ultimate, supreme God", alternatively as "one supreme Goddess",[15] https://en.wikipedia.org/wiki/Henotheism#cite_note-15 thereby asserting that the essence of the deities was unitary (ekam https://en.wikipedia.org/wiki/Ekam), and the deities were nothing but pluralistic manifestations of the same concept of the divine (God).[2] https://en.wikipedia.org/wiki/Henotheism#cite_note-taliaferro78-2[5] https://en.wikipedia.org/wiki/Henotheism#cite_note-alonp370-5[6] https://en.wikipedia.org/wiki/Henotheism#cite_note-fahlbusch524-6 The Vedic era conceptualization of the divine or the One, states Jeaneane Fowler, is more abstract than a monotheistic God, it is the Reality behind and of the phenomenal universe.[16] https://en.wikipedia.org/wiki/Henotheism#cite_note-jeaneanefowler43-16 The Vedic hymns treat it as "limitless, indescribable, absolute principle", thus the Vedic divine is something of a panentheism https://en.wikipedia.org/wiki/Panentheism rather than simple henotheism.[16] https://en.wikipedia.org/wiki/Henotheism#cite_note-jeaneanefowler43-16 In late Vedic era, around the start of Upanishadic age (~800 BCE), theosophical speculations emerge that develop concepts which scholars variously call nondualism https://en.wikipedia.org/wiki/Nondualism or monism https://en.wikipedia.org/wiki/Monism, as well as forms of non-theism and pantheism https://en.wikipedia.org/wiki/Pantheism.[16] https://en.wikipedia.org/wiki/Henotheism#cite_note-jeaneanefowler43-16[17] https://en.wikipedia.org/wiki/Henotheism#cite_note-17[18] https://en.wikipedia.org/wiki/Henotheism#cite_note-18 An example of the questioning of the concept of God, in addition to henotheistic hymns found therein, are in later portions of the Rigveda, such as the Nasadiya Sukta https://en.wikipedia.org/wiki/Nasadiya_Sukta.[19] https://en.wikipedia.org/wiki/Henotheism#cite_note-19 Hinduism https://en.wikipedia.org/wiki/Hinduism calls the metaphysical absolute concept as Brahman https://en.wikipedia.org/wiki/Brahman, incorporating within it the transcendent https://en.wikipedia.org/wiki/Transcendence_(religion) and immanent https://en.wikipedia.org/wiki/Immanence reality.[20] https://en.wikipedia.org/wiki/Henotheism#cite_note-20[21] https://en.wikipedia.org/wiki/Henotheism#cite_note-21[22] https://en.wikipedia.org/wiki/Henotheism#cite_note-22 Different schools of thought interpret Brahman as either personal https://en.wikipedia.org/wiki/Personal_god, impersonal or transpersonal. Ishwar Chandra Sharma describes it as "Absolute Reality, beyond all dualities of existence and non-existence, light and darkness, and of time, space and cause."[23] https://en.wikipedia.org/wiki/Henotheism#cite_note-23
