Which Mayan deity was the god of wisdom and writing?

The Mayan deity associated with wisdom and writing was Itzamna.

Itzamna was an upper god and creator deity in Maya mythology, especially prominent in traditions from Yucatán. Colonial-era accounts portray him as an ancient, powerful figure connected with the sky, creation, knowledge, and the ordering of the world. He was also credited with introducing or preserving important cultural skills, including writing and calendrical knowledge.

The name is often written Itzamná, with the accent marking the final stress in modern Spanish usage. Itzamna is not the same deity as Kukulkan, the feathered-serpent figure associated with wind, rulership, and cultural power, or Chaac, the rain and storm god. Ix Chel, commonly linked with the Moon, childbirth, weaving, and healing, is another distinct deity and is sometimes described in later tradition as Itzamna’s consort.

Maya religion varied across centuries and regions, so divine roles were not always rigidly separated. Even so, Itzamna is the standard answer for a quiz asking for the Maya god of wisdom, writing, and knowledge.