I guess you haven't looked into afrocentrism seriously, as I have. Its institutional origin is largely french "egyptologists", and the largest and most fervent propagators of the myths are here in the US......I guess you COULD blame it on Leakey's showmanship after finding the oldest skull on earth just sitting on that rock in the sun around the bend, waiting for him to find it and write its history. Kinda like telling a story around a circle, nome sain?
Why not start a thread assailing afrocentrism if it so all-important to you for some obscure reason? (sheesh)
I have seen: "At-latl", and I have seen "Atl-atl" , although I have never heard it pronounced by an expert.
Both are plausible, although I would tend to go with the second.