Ixmucane carries clear role-titles in the Popol Vuh's own text, Grandmother of Day and Grandmother of Light among them, but the literal root of her proper name draws competing candidate readings from the text's Mayanist translators, with no single derivation settled.
What would resolve this A philological study of the K'iche' text against related Mayan languages, testing the existing translators' competing conjectures for the name's root against a wider comparative vocabulary, to reach a reading the field can agree on.
OpenK'iche' Maya philology, Mesoamerican historical linguisticstranslated by Dennis Tedlock, Popol Vuh: The Definitive Edition of the Mayan Book of the Dawn of Life