While the possibility of Vulcan being a derivative of Tubal-Cain is interesting, I’d have to see evidence that, in the original languages, this could be so.
I don’t have any evidence at hand, that not being my burden for this article.but passed along that little bit that I had heard. I should have said,”It is believed by some” but thought that “it is believed...” already inferred by some.
Remember, the oldest Bible stories predate the existence of the people who put those stories into the Bible ~ and most have undergone some transformation by being translated from one language to another many different times.
Some of them are like Ma-Nu ~ part of a nearly world wide literary tradition. Then there's The Great Fish image ~
Since we know we don't have a really good compendium of all human literature back to the beginning of the big melt down of the great glaciers about 20,000 years ago, nor do we have a really good fix on the words they used, it is as reasonable to think Tubal Cain has a common origin with Vulcan, as to not think that.