I have two nicknames: one I use here and one I use at the rest of the aethernet: Hellwolve.
I love explaining the latter, because it has a rather boring source: I simply made it up. One evening, long ago, I jotted down all 'cool' words and things I knew at the time, such as 'Nero' and 'Panther'. I also jotted down 'Hell'. 'Wolve' comes from my mistake in making the singular form of the plural 'Wolves'

Now, "Torvald Faust" comes from my Steampunk character and my wish to have pretty much every name of my characters mean something. His/my last name comes from
this Faust; I wanted me/the character to have a super-natural 'connection'.
To fit with the Germanic last name, I looked until I found a nice 'Germanic-ish' first name: Torvald. Which is from the Old Norse name Þórvaldr, which meant "Thor's ruler" from the name of the Norse god Þórr (Thor) combined with 'valdr', 'ruler'.