Any name starting or ending with "el" or "elle" or variants.

Ellen, Eliana, Elise, Elspeth, Michelle, Rachael, Danielle... FWIW, DH liked "Ellie" for a girl but none of the long versions of it, I was OK with just Ellie on its own - we had a boy and he now gets called Welly, which is not the usual nickname you'd expect for his name (eg in your case Danielle would usually get Dan/Dani rather than Ellie).