Just went digging through some seed catalogs where I swore I remembered seeing this. Found one that looks similar sold by Harris Seeds - unfortunately, it's sold as part of an assortment of winged gourds where the included varieties aren't named. (See far right) I'll report back if I can find out.

Concur: The Autumn Wings/ Angel Wings always seem to be sold as an assortment. Actually an ornamental squash (C. pepo) which means it will cross pollinate with summer squash and c. pepo varieties of winter squash. Your phot0 shows some characteristics in shape to this group. If you are using non-commercial seeds you probably have a mongrel.

Could they possibly be edible?? Here's another pic

Yes, but palatable is the real question. Most of this type are bitter and tough.

^ yeah, I would suspect any winged types of being ornamental. You wouldn't die if you ate one, they're just bred for appearances rather than taste/cooking quality.