Here are some possibilities:
* "Datu" itself: In some cultures, "datu" might be used for both men and women.
* "Dayang" or "Dayang Dayang": These terms are commonly used for female members of the royal family or nobility in the Philippines, often associated with the wife or daughter of a datu.
* "Lakan": This term is used for a female chieftain or leader in some regions of the Philippines, but it's not always synonymous with "datu".
* "Panglima": This term is used for a female leader or commander, often associated with military leadership, but it's not always used specifically for a datu.
* Regional variations: The specific term for a female datu might differ depending on the particular region or ethnic group.
It's important to research the specific context and language to determine the most appropriate term. If you're looking for information about a particular culture or region, try to find specific sources on their social structure and leadership roles.