Heimdall Foundation was an isolated enclave of post-skydark scientists who watched the skies, charting stars and the locations of predark space stations. Their base as called Heimdall Point, in Montana. Members were identified by a tattoo - two blue concentric rings bisected by a double helix. (Starfall)
In Norse mythology, Heimdallr (modern Icelandic Heimdallur) is a god who possesses the resounding horn Gjallarhorn, owns the golden-maned horse Gulltoppr, has gold teeth, and is the son of Nine Mothers. Heimdallr is attested as possessing foreknowledge, keen eyesight and hearing, is described as "the whitest of the gods", and keeps watch for the onset of Ragnarök while drinking fine mead in his dwelling Himinbjörg, located where the burning rainbow bridge Bifröst meets heaven. Heimdallr is said to be the originator of social classes among humanity and once regained Freyja's treasured possession Brísingamen while doing battle in the shape of a seal with Loki. Heimdallr and Loki are foretold to kill one another during the events of Ragnarök. Heimdallr is additionally referred to as Rig, Hallinskiði, Gullintanni, and Vindlér or Vindhlér.