What I'm asking, on record, is what the perceived 'beginning' of Kemetic Reconstruction would be, if not the start of HoN, and if there are any examples of movements which may have inspired, influenced or led up to that nodal moment. Perhaps this is a contentious issue, though...
My understanding is that Kemetic reconstruction is one of the second wave of reconstructionist religions that originated in the more general pagan community - an outgrowth of people wanting ways of relating to those gods they considered more "authentic", inspired by the example of Asatru and similar religious revivals. If my understanding is correct, then, it could in part be rooted in a conscious rejection of modern-esoteric Egyptiana - whether ceremonial magic, Isian witchcraft, or whatever else - as insufficiently authentic.
(Rev. Siuda's bio on Kemet.org at least implies in subtext that she pursued her Egyptology studies as part of her religious quest.)