When did queen Kiya die?

Queen Kiya was one of Akhenaten's (King Amenhotep IV) wives back in ancient Egypt. Nefertiti was Akhenaten's chief wife, Kiya was not near as important and little is known of her. She was important though, she bore the king a daughter. Kiya was also thought to have been Tutankhamun's mother. DNA testing has proven that false.

It is unknown whether Queen Kiya was a native Egyptian or a foreign princess. Kiya is an unusual name and could have come from being a foreign princess. The daughter of King Tushratta of Mitanni, Tadukhipa, married Amenhotep III near the end of his reign. After Amenhotep III's death she married Akhenaten. This is all speculation, there is no clear evidence that Kiya was Tadukhipa.

The date of Kiya's death is also unknown. She disappeared from all records in the last third of Akhenaten's reign. If Kiya and Tadukhipa were the same person then it is a possibility that Egypt's alliance with Mitanni ended, resulting in Kiya/Tadukhipa returning home Mitanni.