I love this name but fear it’s too long for a child. I’m not big on nn’s.
WDYT?
I adore it!! I would use it but I think nn’s are inevitable with long names and the obvious nn is [name]Cordy[/name].
[name]Delia[/name] would also be cute but I know you don’t like nn. Maybe you’re better off choosing something shorter and simpler in that case? Like [name]Nora[/name], [name]Claire[/name], [name]Anna[/name] etc.
[name]Love[/name] it!
One of my good friends is [name]Cordelia[/name] (she’s 21). She used to go by [name]Cordy[/name], until she met a guy at a bar and was trying to tell him her name was [name]Cordy[/name], but he thought she was saying Horny. 
As you’d have it, the nn stuck… 
That aside, [name]Cordelia[/name] is delightful… I adore it!
I hadn’t thought if cordy, I do like that!
Question, do you pronounce it cordel-yah or cordel-ee-uh?
My [name]Cordy[/name] pronounces it [name]Cor[/name]-DEEL-ee-yah…
I [name]LOVE[/name] [name]Cordelia[/name]! It’s one of my favorite names, but I’ve never met one in person, so I’m not sure if it’s too ‘out there’ or not.
I’m a huge fan of [name]Cordelia[/name]. I’ve only ever heard it pronounced cor-DEEL-ee-uh. My cousin is named [name]Cordelia[/name] though she has mostly gone by the nickname [name]Dee[/name]. I love the name, especially because it’s the name of a great Shakespearean heroine!
I love the name [name]Cordelia[/name]. I used to babysit for the sweetest [name]Cordelia[/name]. She mostly went by [name]Cordelia[/name] too, her younger sister called her [name]Cordy[/name] though, which is so cute.
I pronounce it [name]Cor[/name]-deel-ya.
I know two Cordelias-- one who goes by [name]Delia[/name] (she’s almost 4) and one who is [name]Cordelia[/name] (about 6 months old.) I think it is an adorable name!
If you don’t care for nicknames, then I think you should probably avoid [name]Cordelia[/name]. If you decide that you love [name]Cordelia[/name] and while you choose to use her full name, you don’t mind if others call her [name]Cora[/name], [name]Cordy[/name], [name]Dee[/name], [name]Delia[/name], etc then go for it!
[name]Cordelia[/name] is fantastic! 
If [name]Amelia[/name] isn’t too long for a child, then [name]Cordelia[/name] isn’t. I can’t say if it’ll be shortened all the time (I’ve never gone by a nickname, but my real name is one syllable shorter than [name]Cordelia[/name]…), but she could always correct people who call her [name]Cora[/name]/[name]Cory[/name]/[name]Cordy[/name]/[name]Delia[/name]/etc. You never know, though, maybe SHE will like the nicknames.
I pronounce it cor-DEEL-ee-ya (or sometimes cor-DEEL-ya when I’m lazy :)). I don’t know any Cordelias, though, so I’ve never actually heard anyone (besides myself) say it out loud (I’ve only heard of the name in [name]Anne[/name] of [name]Green[/name] Gables, [name]King[/name] Lear, and here on Nameberry)…