I used to work on a massively distributed system called Cosmos in Microsoft (there are some public slides and blog posts about it), so I was surprised to hear this, but apparently "Cosmos DB" has nothing to do with Cosmos, it's a completely different system.

Azure actually, in my opinion, made the original Cosmos worse via "synergy"; but apparently they ALSO used the name for something unrelated :) WTF? Now I cannot even tell people anymore because the name is forever associated with this debacle.