The Pharaohs

Djedefre
Birth name: Djedefre ("Enduring like Re")
Rule: 2589 - 2566 BC (2nd king of the 4th dynasty, Old Kingdom)
Noteworthy relatives: Khufu (father), Khafre (brother)
Djedefre became pharaoh after his father Khufu died. Unlike his dad, his brother Khafre, and his nephew Menkaure, Djedefre didn't build a pyramid at Giza; he chose to build at a site called Abu Roash instead. No wonder you probably never heard of him!
Djedefre was the first pharaoh to add the title "Son of Re" to his birth name.

= "son of Re"
Red granite head of Djedefre. By Louvre_032007_19.jpg: Neithsabes derivative work: JMCC1 (Louvre_032007_19.jpg) [Public domain], via Wikimedia Commons
Ruins of Djedefre's Pyramid. By No machine-readable author provided. AhlyMan assumed (based on copyright claims). [Public domain], via Wikimedia Commons
Watch: "The Lost Pyramid of Djedefre"