Kukulcan
Kukulcan was the ‘feathered serpent’ god of the Mayan religion. He also had a human form that closely matches a description of a tall Caucasian, white-skinned, blue-eyed with blonde or silver hair. This similarity led to the European invaders being initially greeted as ‘gods’. There have been frequent suggestions that the original Kukulcan was a survivor of the demise of Atlantis, who managed to escape to Mesoamerica bringing the knowledge of the lost city to the Americas. However, it must be stressed that this is only conjecture. The Aztecs and Toltecs had a similar god, Quetzalcoatl, who had a matching description.
Pierre Honoré claimed that these ‘deities’ had arrived from Crete bringing with them their script. As the use of the Cretan Linear A & B had ceased by 1400 BC Honoré surmised that these transatlantic trips took place before that date!
Cuchulainn, an Achilles type hero in Irish mythology, has also been speculatively linked with Kukulcan because of the name similarity, an idea that has never had any scholarly support.>So it was no surprise that the unreliable Xavier Séguin supported this silly idea(a). Even Philip Gardiner seems to have been seduced by this linkage, noting in The Serpent Grail “that the Irish have a Celtic god-hero named Cuchulainn, which is too similar to the Mayan Kukulcan to be mere coincidence.”<
(a) https://www.irishcentral.com/roots/history/irish-hero-cu-chulainn-was-a-mayan-god *