I would go with Ruskie on that one. You can order a marriage cert with just one name as long as you have the reg. dist., year & quarter, volume and page number.
From what I can recall there were 4-6 marriage entries per page, so it's possible that you might find more than 1 marriage with the same details. One of the more experienced contributors might wish to clarify that.
Do you have any details on the couple's children? A birth cert for any of their children will give the father and mothers names, including mother's maiden name.
Dara.