IMO, Eloquence is a series and not a label. I did several edits into this direction and no one ever complained. Note that there is also the questionable label Australian Eloquence (EDIT: I moved all those releases to series Eloquence and a new series Australian Eloquence by now.)
For the case of “Deutsche Grammophon Resonance” mentioned by reosarevok: That case is a bit more complicated as the name “Resonance” is somewhat attached to the logo of Deutsche Grammophon, which might be interpreted as a new logo on its own. And in 1994 Deutsche Grammophon started to use a label “Resonance”, without the logo of Deutsche Grammophon.
The label was created and the label code entered in this edit when entering this release. It says ‘see artwork’, but looking at the artwork for that release I can’t see the label code. Perhaps I’ve just missed it somewhere though…
The cover art for this Philips Classics release does have a label code on its rear cover though, and it’s LC 0305, which is the label code for Philips Classics: further evidence that Eloquence should indeed be a series rather than a label in its own right.
I wonder if it’s worth leaving the Eloquence label in place with the disambiguation comment and annotation I’ve added so that editors know not to add releases to the release, or to add a new Eloquence label.