Last names for a character?

hello, I'm writing a novel, um its along the lines of harry potter, but different. i need a last name(preferably english) to go with Delilah and i would also like some of you to through a round full names for other characters. thank you very much your efforts are much appreciated!!
Update: I actually need two last names for Delilah. her mothers last name and her fathers but they need to sound good with her name, please help ive racked my brain for over a month!
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