In the Mayan tradition, Lakin Chan is the Serpent of the east. He is the creator of mankind and all of the earth. He invented writing and is the guardian of herb-lore, medicine and book. He is the son of Hunab-ku, the god behind the gods.
John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Lakin Chan, p 289