I actually seriously considered changing my middle name to Danger last year. However, I decided it wasn't worth the trouble for a cliche pickup line due to me being a dual citizen, and a resident in another, so I'd have to change my middle name in 3 different countries.
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"Conqueror of worlds". Robert Conqueror of Worlds Smith sound like you know what you're doing when handling a nuke.
I use my middle initial (see my username) because there are plenty of Andrew Martins in these circles.
John 003'hdeadface Smith. Known as "six" to his friends.
BTW relevant episode is called "Homer to the Max".
[0] https://en.wikipedia.org/wiki/Harry_S._Truman#Early_life_and...
Take for example Sükhbaatar. Translation? “Axe hero”
You could do worse than a Mongol name for yourself.