I've always pronounced Delia dee-lee-uh.
Ooh, Bingley my sweet, how very elegant! Much lovelier than my down-home DEEL-ya.

C.K., I really wish I could have heard your band! [heaving sigh-of-regret emoticon] I would have worn my rara proudly!
(Whatever it is.)

Jo, (interesting--most people, I refer to by their screen names, but you are always and ever, just Jo)--
Yes, love child was already in use here when the song came out. There was great stigma about it then.
But I have to disagree with your choice of worst rendition:
of this list, the worst has to be "Yummy yummy yummy, I've got love in my tummy". Dead serious, folks--that was a real song, actually played on the radio.