Smenkhare was a pharoah, who supposedly ruled as regent with Nefertiti, after Akhenaton disappeared. But some egyptologists say that Smenkhare was actually Nefertiti herself. He does appear on some wall reliefs, and is depicted wearing the royal crown. But who he was and whether he was real is up for debate. Until they figure out more about the Amarna period, it is doubtful they will know any more than they know now.

Hatshepsut was the only female pharoah until the Cleopatras of the Ptolemaic period. She was married to her brother Tuthmosis and when he died she made herself regent for her nephew Tuthmosis 3rd. Then basically sent him off to fight with the army, and took control of the crown herself. In most of her wall reliefs she is depicted wearing the male false beard of the pharoahs. Her temple at Deir El Bahari is magnificent, I think Mushtaq has already posted some photos of it. She added much to Karnak temple, including the enormous obelisks there. She was an amazing pharoah who brought much prosperity to Egypt. On her death, Tuthmosis regained his crown, and defaced all of her wall reliefs, thereby removing her from history.