I think you need three syllables with the stress on the first or second, and I'd avoid a name beginning with D, or ending with D or T.
Just a few examples that I think go quite well with Dent (I deliberately haven't read all the suggestions, so you can see if more than one person has chosen some of them):
Emily, Eliza, Francesca, Bethany, Vivien, Natalie, Rebecca, Isabel
Jeremy, Anthony, Christopher, Benjamin, Joshua, Harrison, Theodore, Oliver