Dubiel-Wrona wedding photo

I have posted a photo of my grandparents' wedding on my site (http://ca.geocities.com/bprzeklasa/FamilyTree.html)
The bride and groom, of course, are Urszula Wrona and Piotr Dubiel but I don't know who the others are. The wedding took place in Toronto in the 'teens of last century. Does anyone in the photo look like anyone in any old family photos you might have?