Full name for Dee

I’ve got a character, and i want her nn to be [name]Dee[/name] or [name]Deedee[/name], but i want her to have a longish name in real life, so that she seems down to earth and less like her snobbish parents (who are the [name]Marquis[/name] and [name]Marquess[/name] of Tiberwood, and are extremely traditional)

Any ideas?

[name]Diana[/name]
[name]Deanna[/name]
[name]Dona[/name]
[name]Dorothea[/name]
[name]Deidra[/name] (or is it spelled Diedra?)
[name]Dana[/name]
[name]Danica[/name]
[name]Delilah[/name]

And more of a stretch…
[name]Daffodil[/name]

[name_f]Dawn[/name_f]- A friend called this goes by [name_f]Dee[/name_f]
[name_f]Danielle[/name_f]- i have thought about going by DD or deedee! lol
[name_u]Delaney[/name_u] - Starts de xx

Let’s see. Longer names that a traditional/snobby [name_m]Marquess[/name_m] & [name_m]Marquis[/name_m] might pick:

[name_u]Damaris[/name_u]
[name_f]Diantha[/name_f]
[name_f]Demetria[/name_f]
[name_f]Drusilla[/name_f]
[name_f]Delphine[/name_f]
Dionysia
[name_u]Dominique[/name_u]

[name_m]How[/name_m] about [name_f]Danna[/name_f]? Or [name_f]Danae[/name_f]?

Well, I was just reading a post about the nickname [name_f]Deedee[/name_f]. Here are some of the suggestions from it:
[name_u]Demeter[/name_u]
[name_f]Demetria[/name_f]
[name_f]Desdemona[/name_f]
[name_f]Dionne[/name_f]
[name_f]Diana[/name_f]
[name_f]Lydia[/name_f]
[name_f]Audrey[/name_f]
[name_f]Madeline[/name_f] (via [name_f]Maddie[/name_f])
[name_f]Sadie[/name_f]
[name_f]Zadie[/name_f]
[name_f]Acadia[/name_f]
[name_f]Arcadia[/name_f]
[name_u]Cassidy[/name_u]
[name_f]Melody[/name_f]
[name_f]Nadia[/name_f]
[name_f]Nadine[/name_f]
[name_f]Heidi[/name_f]
[name_f]Wendy[/name_f]
[name_f]Claudia[/name_f]
[name_f]Mercedes[/name_f]
[name_f]India[/name_f]
[name_u]Indiana[/name_u]
[name_f]Jadine[/name_f]
[name_u]Andrea[/name_u]
[name_f]Belinda[/name_f]
[name_u]Darcy[/name_u]
[name_f]Denise[/name_f]
[name_f]Dinah[/name_f]
[name_f]Dorothy[/name_f]
[name_f]Dorothea[/name_f]
[name_u]Linden[/name_u]
[name_f]Lucinda[/name_f]
[name_f]Magdalena[/name_f]
[name_f]Rosalind[/name_f]
[name_f]Sidonie[/name_f]
[name_f]Cordelia[/name_f]
[name_f]Delia[/name_f]
[name_f]Adelia[/name_f]
[name_f]Odelia[/name_f]
[name_f]Odile[/name_f]
[name_f]Odette[/name_f]

Oh, wow. I think niteowl covered this one. I doubt I have any ideas that haven’t been said already, but I do have a few suggestions. Sorry for any repeats!
[name_f]Deanne[/name_f]/[name_f]Deanna[/name_f]/[name_f]Deandra[/name_f]
[name_f]Deborah[/name_f]/[name_f]Debra[/name_f]
[name_f]Dedre[/name_f]/[name_f]Dedra[/name_f]
[name_f]Dehlia[/name_f]/[name_f]Delilah[/name_f]
[name_f]Deirdre[/name_f]
[name_u]Delaney[/name_u]/[name_f]Delanie[/name_f]
[name_f]Delcie[/name_f]
[name_f]Delfina[/name_f]
[name_f]Delinda[/name_f]
[name_f]Della[/name_f]
[name_f]Delores[/name_f]
[name_f]Delphine[/name_f]
[name_f]Denese[/name_f]
[name_f]Desdemona[/name_f]
[name_f]Desaree[/name_f]
[name_f]Dessa[/name_f]

I hope some of these are what you’re looking for!

What about [name_u]Cassidy[/name_u]? I actually did this for one of my short stories. It was steampunk and I wanted something unusual but not too weird so I just used this name as my main character’s full name but used [name_f]Dee[/name_f] as the name she went by.

[name_m]How[/name_m] 'bout :

[name_f]Ardeena[/name_f]
[name_f]Aydeena[/name_f]
[name_f]Bedeelia[/name_f]
[name_f]Bernadeena[/name_f]
[name_f]Candeea[/name_f]
[name_f]Deedra[/name_f]
[name_f]Deena[/name_f]
[name_f]Deetta[/name_f]
[name_f]Deeva[/name_f]
[name_f]Edeena[/name_f]
[name_f]Gardeenia[/name_f]
[name_f]Kadeeja[/name_f]
[name_f]Khadeeja[/name_f]
[name_f]Nadeeda[/name_f]
[name_f]Odeelia[/name_f]
[name_f]Tadeeta[/name_f]

[name_f]Alexandria[/name_f], [name_u]Andrea[/name_u], [name_f]Cordelia[/name_f]

[name_f]Delia[/name_f], [name_f]Cornelia[/name_f]

[name_f]Deirdre[/name_f]… Or [name_f]Deandra[/name_f]…

I read a book once where a character named [name_f]Delicia[/name_f] went by [name_f]Dee[/name_f].