My dad pointed this out years ago an am now wondering if it's really true or just a coincidence. He's a big football fan and joked about it after the Minnesota team. But I'm curious if it applies to the name who raided England, France, etc many centuries ago.
VI is the number 6 in Roman numerals, but 'king' in latin is 'rex'. The word 'king' is from Old English.
The word for 'king' in Old Norse is 'konungr.' It has no connection to the word viking, the derives from which is 'vikingr' whose true origin is unknown. Its the 'vik' part that is the root, and likely means either a raider, or a maritime connection, or a place name.
Oh wow, I had no idea, thanks for clearing that up. :-)