chieftainess

noun

1. A female chieftain.

   “He gazed in silence for some minutes upon the body of Meg Merrilies, as it lay before him, with the features sharpened by death, yet still retaining the stern and energetic character which had maintained in life her superiority as the wild chieftainess of the lawless people amongst whom she was born.”

   “Mrs. Douse was more important than Mr. Douse; she was a chieftainess in her own right, and had great dignity.”

2. The wife of a chieftain.