God of War theory; the "Lævateinn" Axe
So the God of War games are very good at putting in nods to the real mythology despite being a new take on it. There are plenty of easter-eggs to more obscure myths in each game and it got me thinking about the Axe. So I know the Axe is suppose to be made by Sindri and Brok but somethings about it make me thing of preexisting legendary Norse weapon. In the game they say the weapon was made for Faye, Atreus's (Loki) mother and named after his son, Jormungandr. Since a lot of the game focuses on Atreus being Loki it would make sense for his mother's axe that was named after his future son to have some significance to him and interestingly Loki's crafted a weapon himself that bore a similar name. It may just be a reference to the biblical Leviathan because Jorrmungandr was compared to one but I think it would be much cooler if it's similar name was a nod to Loki's personal weapon, Lævateinn. To be fair Lævateinn isn't very well described to my knowledge, descriptions vary from dart, to sword, to arrow, to wand, but one thing is usually pretty consistent about it. It's a projectile. Meant to be thrown and assumedly return to it's wielder, much like the Leviathan Axe in the most recent God of War.
