Details on certificates are only as good as the information supplied. It was not at all unusual for a male family member or a completely fictitious person to be named as father on a marriage, simply to conceal illegitimacy.
My mother in law was illegitimate, when she married my father in law there is a blank space where her Father's name would have been. They later divorced and she remarried, on that certificate is the name of the man who was the father in the foster family who brought her up. We know he definitely was not her father as she didn't know who her birth mother was until I ordered her full birth certificate, she only had the shortened version which just gives the child's name, date and town of birth.