In the Thor movies, I noticed a symbol of Triquetra. This can be seen on Mjolnir. For example, we can see triquetra symbol on Mjolnir. [I'm pretty sure that I have seen it in the movies too but couldn't find it right now.]
Image taken from this website
This same symbol is also shown in Thor : Ragnarok film when Hela destroys the ceiling and tells her story to the executioner before she resurrects the army of dead. So, there is an importance to this symbol according to Asgardians.
After reading some articles on the internet, I came to know that different cultures interpret this symbol differently and have different meanings.
What does this symbol mean with respect to Asgardian culture?