Esmèe/ Esmay/ Esmè - Esme. Other spellings are tacky.
Riley/ Ryliee - Riley is ok, Ryliee is definitely not.
Tiffani/ Tiffany - Tiffany is lovely! Tiffani, no.
Cleo - ok
Cally/ Callie - this would be nice as a shortening for something.
I'd use Tiffany, possibly Esme. Tiffany is that bit different which pushes me to it.
Suggest: Hazel, Carina, Rowan, Lucia, Adalind, Paloma, Heather, Sky, Willow, Liberty, Naomi, Carmen, Rosa, Rosalie, Carlotta, Freya, Cora, Audrina, Rhea, Pearl, Lydia, Scarlet, Tamsin, Carys, Felicity, Serena, Rhian, Ramona, Leona, Astrid, Eden, Amara.