Menkauhor was the successor of Nyuserre on Egyptial throne. His origin is pretty unclear, a family stem wasn't found yet, where this ruler should belong to. According to Turin King List he ruled for 8 years and left a sign in Wadi Maghareh after him.
Menkauhor was the last Pharaoh from the 5th dynasty, who let build a sun temple called Horizon of Ra. Unfortunately neither the temple nor his pyramid wasn't found yet.