Jane, it might not be too hard if you prepared the post and then pasted it into one profile after the other. However, if it is, maybe you could post a comment on the profile of each bride and groom noting that you've created the FSP and that interested PMs might want to see who attended their ancestor's wedding.
You must have found the profiles at one time, since you linked to them. I'd think it would be easier to add a (reverse) link at that time.