Lady Wac-Chanil-Ahau (modern reading - Ix-Wak-Chan-'Ajaw-Lem?) was a Maya princess c. 682 AD who was part of an arranged marriage between the Maya cities of Dos Pilas and Naranjo (in modern Guatemala) to include Naranjo into the Calakmul–Dos Pilas alliance. Instead, Naranjo defeated Caracol in a power struggle.
Her son K'ak' Tiliw Chan Chaak was an important figure in later Maya development.