Khentkaus
Fourth DynastyTitled "King's Mother" and "God's Daughter," Khentkaus was characterized in an inscription as the mother of "Two Kings of Upper and Lower Egypt," presumably Sahure and Neferirke, Fifth Dynasty. She may have served as a regent for a time. She seems to have been daughter of Menkaure, or of Hordjedef, son of Khufu. She was married to Shepseskhaf (Dynasty 4) or Userkaf(Dynasty 5). Khentkaus is said to have married a priest and her sons inherited and initiated the fifth dynasty. In an inscription she may have a kingly title -- but there may have been two women of the same name, and a later regent of the same name may be confused with the earlier queen, their stories conflated.
Nimaethap or Ni-Maat-Heb
Third Dynasty"King's Mother" of Djoser, who was probably the second king of the Third Dynasty, the builder of the step pyramid at Saqqara. She may have served as regent for him.
Meryt-Neith or Merytneith or Merneith
First Dynasty (~3000 BC)Wife of Djet, Mother of Den. Her tomb is with the tombs of other First Dynasty Pharaohs, she was buried with honors usually used for kings including a boat to travel to the next world, and her name is found on a seal with the names of other First Dynasty Pharaohs. But on that seal, her symbol is that of a King's Mother and the other names have the sign of Horus, for a Pharaoh. So perhaps she was a regent, but the evidence is not clear.
