Xmucane and Xpiacoc, alternatively Xumucane and Ixpiyacoc (Xpiyacoc), are the names of the divine grandparents of Maya mythology of the Kʼicheʼ people and the daykeepers of the Popol Vuh. They are considered to be the oldest diviners who are very close to the supreme creators of the Kʼicheʼ pantheon and are identified by a number of names throughout the text, reflecting their multiple roles throughout the Maya creation myth. They are usually mentioned together, although Xmucane seems to be alone during most of the interactions with the Maya Hero Twins, when she is referred to as simply "grandmother".