Overview
Ka, also (alternatively) Sekhen, was a Predynastic pharaoh of Upper Egypt belonging to Dynasty 0. He probably reigned during the first half of the 32nd century BC. The length of his reign is unknown.
Name
The correct reading of Ka's name remains uncertain. There are vessel inscriptions which show a serekh with a typical Ka-symbol, both written upright correctly, but there are also inscriptions presenting an upright serekh with an upside-down Ka-symbol inside. The second form of that writing indicates a reading as Sekhen (meaning "to embrace someone") rather than Ka. It was also thought to be the birth name of Narmer. Because the reading of the name is so uncertain, Egyptologists and writing experts such as Ludwig David Morenz prefer a neutral reading as "King Arms". Ka's personal name may have been 'king Ap.'
Reign
Ka ruled over Thinis in the first half of the 32nd century BC and was buried at Umm el-Qa'ab. He most likely was the immediate successor to Iry-Hor and was succeeded either by Narmer or by Scorpion II. He is the earliest known Egyptian king with a serekh inscribed on a number of artifacts. This may thus be an innovation of his reign. Ka is one of the best attested predynastic kings with Narmer and Scorpion II. Beyond Abydos, he is attested in the predynastic necropolis of Adaima in Upper Egypt and in the north in Tarkhan, Helwan, Tell Ibrahim Awad, Wadi Tumilat and as far north as Tel Lod in the Southern Levant.
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