The fact that Florida lists the records separately for bride and groom is frustrating when they don't show the other parties' name, but at least one version of this record does show it as Wilhelm. The problem is that we can't tell for sure if that is his given name or his last name. I tried nosing around a little and came up as empty as you did.
If you're REALLY motivated, to the point of paying for it, perhaps you can purchase the record from Florida state records, but I suspect that there might not be any more on the record, although it's possible that the transcriber couldn't decipher the full name, so only included the part they could. Of course, if you pay for the record then that will pass the problem of illegibility on to you.
I commiserate, but recommend that you have some chocolate to make you feel better and then move on to something else.
