Hayagriva is also one of the main archetype deities of the Nyingma Order. Hayagriva is one of the emanations of Bodhisattva Avalokiteshvara in terrific form.
Aparmita is the name given to Amitabha in his character of bestower of longevity. Aparmita may be turned either a Crowned Buddha or a Bodhisattva and is therefore richly clad and wears the thirteen ornaments.