Thanks for your reply. It's actually just showing me the name I gave it (in parenthesis). Below you can see I've named it "1" and the dropdown is showing me which comps & layers in those comps (normal behavior), and the name that it is using in those comps (It's showing "1" on each because I have not re-named it in those comps).
I am trying to figure out which layer name it is in the Illustrator file, which has tons of layers. This happened also on a co-workers project, so I was hoping to figure out a way to retrieve that original imported name.
(You can see some of the other original names in the project area below the highlighted file. The one I accidentally renamed originally had a similar name, ##/NA map layers named.ai)
I exported as an XMP in hopes it saved the original name in there, but it did not (at least not in human readable form!).