Are you sure of your dates?

On the IGI, I found a WILLIAM ORR who
married an ESTHER BOYD on 10 Nov
1874 in Port Glasgow, Renfrew.
If you get this marriage cert from SP, then you’ll be able to see both his and her parents’ names.
Also on IGI:
Sarah ROBISON (note spelling) married WILLIAM ORR on 16 Sept 1845, All Saints, Donegal, Ireland.