The origin of the Ankh sign

This paper adds another option to the existing list of possible sources that may have served as a representation for the ancient Egyptian ankh symbol. The etymology of the ankh symbol is still a subject of debate today, as there is still no evidence for the proposed sources. The ankh symbol represents “life” so one would expect the source to resemble this aspect. In ancient Egypt, the main aspects related to life were the Nile, the moment of sunrise and the horizon. The Nile as the source for agriculture, the rising sun as the reborn god Horus in the aspect of Horemakhet who restores order, and the eastern horizon as the place of (re)birth. These three aspects somehow reflect the three consonants ^cnḫ that define the ankh symbol. Could it be that this ankh symbol has its origins in the image of the rising sun on the horizon reflecting its rays on the waters of the Nile which was seen as the reborn Horus radiating his life force across the Nile?