The description of Esau’s family in Genesis 36 and I Chronicles 1 has the figure of Timna change gender in the span of a few verses. She is a concubine, a sister, and then a male head of a clan. This study uses archaeology to help us understand the function of multiple genders in the Hebrew Bible’s genealogies which originated as oral mental maps of how the various Canaanite tribes related to one another politically and economically.