Ahura is the Avestan Zoroastrian term for Lord, e.g., Ahura Mazda or "Lord Mazda" (Pahlavi Ormazd). The word is cognate to Sanskrit Asura and Germanic As.

In the Vedas this title is applied to divine beings in general.

A trinity of divinities are adressed as "Ahura" in Zoroastrianism Ahura Mazda, Agni and Mithra.

Source: Mary Boyce, A History of Zoroastrianism; E.J. Brill, 1989.