Hayasirsa
Hayasirsa is the horse-headed protector of scripture, an incarnation of the Hindu god, Vishnu. He rescued the sacred teachings of the Vedas from the bottom of the ocean at the request of Brahma, for two spirits had abducted and hidden them there.
John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Hayasirsa, p 231