Aryaman (अर्यमन्, pronounced as "aryaman"; nominative singular is aryama) is one of the early Vedic deities. His name signifies "bosom friend", "play-fellow" or "companion". He is the third son of Aditi, the mother of the Adityas. In the RigVeda Aryaman is described as the protector of mares, and the Milky Way (aryamṇáḥ pánthāḥ) is said to be his path. In the Rigveda, the Adityas are also all Asuras, and as such Aryaman is commonly invoked together with Varuna-Mitra, Bhaga, Bṛhaspati, and other Adityas and Asuras. While in later Indian tradition there are two major groups of gods, the Devas and the Asuras, pitted against each other, this was not yet the case in the Rigveda, where the two groups are not yet distinct and the Asuras are not yet demonized.
The Hindu marriage oaths are administered with an invocation to Aryaman being the witness to the event.