Based on my understanding of the societies in question by us all, there is NO doubt that there was an Egyptian influence on them. I just don't know how deep it was ECS.
Just starting with the Sun is a good place to start. The planet is used by them ALL, but that is not significant enough info by itself without the proper lore its use by each them for. Not for me anyway. I will die trying to know for sure.
It makes it tough when they had secret rituals based on secret knowledge. I am banking that the secret knowledge is not really secret,
" it is just a secret that the secret society used the selected ancient knowledge."
L.C.