This is not about the character in the Harry Potter series.
‘Hermione’ is of Greek origin, and I’ve found: ‘Earthy’ (or ‘Of the Earth’), ‘Eloquence’, ‘Well born’, and ‘Stone’. Which is it? Where did the name come from?
Dennis is an Anglicization of French Denis which in turn comes from Dionysius – “of or pertaining to the god Dionysos.”
Hermione is similar in origin, and I don’t have the particular etymological sequence at hand, but it’s the feminine form for hermionis, with a meaning of “of or pertaining to the god Hermes.” The variant characteristics ascribed to him in mythology give rise to the “meanings of the name” in baby books, etc.
Didn’t Hermes want to be a dentist? 
SWEET MANATEE OF GALILEE! 
I found this page on Hermes.
From time to time I’ve come across books and pages that explain who the ancient gods were, but I’ve never actually read the stories. Are there any books that tell the legends themselves, instead of just the biographies?
I’ve now found this by searching on ‘Hermes’ and ‘Hermione’ and excluding the Harry Potter stuff:
Looks as if I have more reading to do.
Thanks for the ‘Hermes’ tip, Polycarp! 
Ironic, since both of the Granger parents in the Harry Potter books are dentists.
According to Bulfinch’s Mythology, Hermione was the daughter of Helen and Menelaus. She married Neoptolemus, son of Achilles
:smack:
Not to mention a certain order and type of magic called ‘hermetic.’
Peace.
I have a dental extraction hermetically sealed in a jar.
Which is also named after a Hermes - Hermes Trismigestus, the alleged, although sadly apocryphal, author of many esoteric texts, including The Emerald Tablet. He was the Greek Hermes melded with the Egyptian Toth.
As an aside, none of this is accidental. Rowling has an astounding knowledge of Western Esoteric Magick. Most of her characters, books and theories are based on actual or mythological people, books or theories. Always makes me giggle when Fundamentalists go crazy because she’s “promoting witchcraft” via broomsticks and magic wands. Um, no…but there’s a whole new generation who now knows who Nicholas Flamel was!