This study presents a new critical approach to a group of Egyptian mummified human remains from the Roman Period. Both this approach and, I propose, the mummies themselves, challenge traditional methods of classifying sex/gender which perpetuate colonial narratives of Egyptian life. I demonstrate the necessity of contextualizing the mummies within their cultural ontologies by drawing on Egyptian primary textual and iconographic evidence, and utilize new work in social bioarchaeology and queer studies to argue for broader and more culturally appropriate possibilities regarding sex/gender. This approach contests past conclusions, especially concerning one mummy from the British Museum, and substantiates that gender-expansive lives in Ancient Egypt existed and persisted under Roman rule.