Hi @ichalnijciac ,
This is an interesting topic, the origin of the Atlassian name comes from Wikipedia.
The name is an ad hoc derivation from the titan Atlas in Greek mythology who had been punished to hold up the Heavens after the Greek gods had overthrown the Titans. (The usual form of the word is Atlantean.) The derivation was reflected in the company's logo used from 2011 through to the 2017 re-branding through a blue X-shaped figure holding up what is shown to be the bottom of the sky.
The Atlassian logo was called "Charlie" (R.I.P.) and was actually a mistake, albeit not Atlassian's directly.
Atlas was the Titan who held the Heavens up from the Earth, but most representations of him are wrong (see https://www.google.com/search?q=atlas+titan+heavens+earth&tbm=isch ) - they show him holding the Earth up from something. It should really have been a globe with Atlas holding up a curved representation of heaven - the Titans feet should be on Earth!
Charlie would have been more accurate if the arc was upside down!