I've only recently noticed this old-fashioned gem.
(I prefer DEH-lee-a to DEE-lee-a.)
And I can't but compare
Delia to
Adelia, (and to unrelated)
Delilah and
Dahlia.
And it seems, that soft mellow
Delia is overshadowed by flamboyant
Adelia, dazzling
Delilah and vibrant
Dahlia.
Even though, I'd still prefer
Adelia to
Delia, I find the latter endearing and quite interesting.