The list of vitamins can be kind of confusing, what with all those B vitamins and a random K thrown in. But every name has its story.

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Sources:
https://books.google.com/books?id=1CM...
http://www.ncbi.nlm.nih.gov/pmc/artic...
http://www.ncbi.nlm.nih.gov/pmc/artic...
http://onwisconsin.uwalumni.com/featu...
http://www.ncbi.nlm.nih.gov/pubmed/23...
http://www.clinchem.org/content/43/4/...
http://www.nlm.nih.gov/medlineplus/dr...