If you have to put it’s actual spelling in brackets because even you are doubtful people will understand it, it’s probably not a good idea to use Ivoree, is it?
Well, not a lot to go on, but I’ll give a few ideas! I do, however, like [name_u]Reese[/name_u] with [name_u]Rylan[/name_u]. So that is my favorite from your list.
More suggestions:
[name_f]Annika[/name_f] or ([name_f]Ailsa[/name_f])
[name_f]Bianca[/name_f] or ([name_f]Britta[/name_f])
[name_f]Capri[/name_f] or ([name_u]Colbie[/name_u])
[name_f]Davina[/name_f] or ([name_u]Darby[/name_u])
[name_f]Elodie[/name_f] or ([name_u]Everly[/name_u])
[name_f]Faye[/name_f] or ([name_u]Finley[/name_u])
[name_f]Giselle[/name_f] or ([name_f]Gidget[/name_f])
[name_u]Haven[/name_u] or ([name_u]Hartley[/name_u])
[name_f]Iris[/name_f] or ([name_f]Isla[/name_f])
[name_f]Joelle[/name_f] or ([name_f]Josette[/name_f], cute nickname [name_u]Josie[/name_u])
[name_f]Katerina[/name_f] or ([name_f]Kinley[/name_f])
[name_m]Lennox[/name_m] or ([name_f]Luella[/name_f])
[name_f]Macy[/name_f] or ([name_f]Marina[/name_f])
[name_f]Nadia[/name_f] or ([name_f]Naomi[/name_f])
[name_f]Odelle[/name_f]
[name_f]Perla[/name_f] or ([name_u]Paisley[/name_u])
[name_m]Quinlan[/name_m] or ([name_u]Quincy[/name_u])
[name_u]REESE[/name_u] or ([name_u]Risa[/name_u], or [name_f]Roxie[/name_f])
[name_f]Sable[/name_f] or ([name_u]Shelby[/name_u])
[name_f]Trista[/name_f] or ([name_f]Thalia[/name_f])
[name_f]Vienna[/name_f] or ([name_f]Veronica[/name_f])
[name_u]Waverly[/name_u]
[name_f]Yvette[/name_f]
Zasha
I think [name_u]Ivory[/name_u] is pretty, although possibly controversial. I dont see the point in changing the spelling.
[name_f]Grace[/name_f] is lovely, [name_u]Reese[/name_u] is ok but I dont love the alliteration with [name_u]Rylan[/name_u].
Maybe;
[name_u]Sasha[/name_u]
[name_f]Ivy[/name_f]
[name_f]Coral[/name_f]
[name_f]Scarlet[/name_f]
[name_f]Orla[/name_f]
[name_f]Maya[/name_f]