Hieroglyphs on their 4,000-year-old coffins told part of their story. Each man was described as the son of a woman named Khnum-aa. The burial ground earned the nickname "the tomb of the two brothers."
The two brothers have been on display in Britain, in the Manchester Museum, since 1908. Yet, nearly from the start, experts cast doubt on the men's fraternal relationship. A team led by anthropologist Margaret Murray, the first female archaeologist to become a lecturer at a British university, argued that "it is almost impossible to convince oneself that they belong to the same race, far less to the same family." The mummies' skull anatomies were too different, the scholars said. Later, researchers studied scraps of their skin. They agreed with Murray's team - the mummies' distinct complexions suggested these men did not share parents.
No one had it quite right. A new genetic analysis aims to clear up this relationship. Khnum-Nakht and Nakht-Ankh were, as the text on their coffins suggested, mummies from the same mother.
But call it the tomb of the two half-brothers instead: They probably had different fathers. "We have solid genetic proof that backs up the hieroglyphics, which define the brothers by their mother's name and not the father's name," said Konstantina Drosou, a University of Manchester geneticist and author of a new study in the Journal of Archaeological Science.
A retired dentist, Roger Forshaw, delicately pried molars from the mummies, two from Nakht-Ankh and three from Khnum-Nakht. From the teeth, geneticists extracted DNA.
Khnum-Nakht was the elder half-sibling by 20 years. The hasty way he was mummified indicates he died suddenly; Nakht-Ankh, who probably died about six months after his older relative, was wrapped with more care. (Khnum-Nakht's poorer preservation made DNA extraction particularly difficult, hence the extra tooth required.)
A previous genetic study, using liver and intestinal samples, suggested the men weren't at all related. But a new generation of DNA techniques has enabled geneticists to rely on hard tissue, rather than soft, from which Drosou and her colleagues acquired "good quality DNA."
Mitochondrial DNA produced convincing results. "Because we recovered nearly complete [mitochondrial DNA] profiles, we can be very confident that they are maternally related," Drosou said. Data from Y chromosomes, however, were spottier. But the information was complete enough to indicate that these men probably had different fathers. "Comparisons between six regions of the Y chromosome indicate that possibly they have a different father," she said.
Khnum-Nakht and Nakht-Ankh were not royalty. Each was the son of a local governor, according to the heiroglyphics. A governor was "basically the headman of the local town, making them elite," said Campbell Price, the curator of Egypt at the Manchester Museum who worked with Drosou on the new research. "Most people were farmers, remember."
Price said the discovery suggests an underemphasized aspect of this culture: the role of women in Egyptian high society. Khnum-aa, a member of the "highest social circles," probably had a son with one local ruler and then, two decades later, had a son with another. "Perhaps," he wondered, "the male local governors were only able to confirm or maintain their power by marrying this woman called Khnum-aa?"
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