Geise, Gernot & Prahl, Reinhard
Gernot L. Geise (1945- ) & Reinhard Prahl (1967- ) Geise has written on a number of mysteries ancient and modern(b), the Pyramids, Revised Chronologies and three books on the alleged moon landing hoax(c).
As a guest author he offered a controversial paper on the Atlantisforschung.de website with the self-explanatory title of ‘The Giza pyramids were not built by ancient Egyptians’(d).
He has contributed regularly to the German EFODON magazine, of which he is a founding member.
Prahl has written on possible connections between the Guanches and the ancient Egyptians(a) and has collaborated with Geise to produce Auf der Suche nach der Mutterkultur (In Search of the Mother Culture)  in which they support the idea of Atlantis in the Antarctic.
(b) https://www.glgeise.de/ (German)
(d) https://qk2c5gnj7bksvanmqawmomjyna-adv7ofecxzh2qqi-atlantisforschung-de.translate.goog/index.php?title=Die_Pyramiden_von_Gizeh_wurden_nicht_von_Altägyptern_erbaut (Link Broken)