Fleur Delacour
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Her full name was Nymphadora Tonks.
There is no scientific name for Harry Potter.
Please note that Harry Potter is a ficticious story, so talking about "real names" is a bit ... doubtful. The full name of this character is Hestia Jones.
Her full name is Hermione Jean Granger, or Hermione Jean Weasley when she married. J.K. Rowling originally said that her middle name was Jane but in book seven it was changed to Jean. It is presumed she did this so she did not have the same middle name as Umbridge.
I assume you refer to Ginny Weasley, full name Ginevra Molly Weasley.