Ive managed to find on ancestry that my great grandfather Patrick McKay and his siblings were bapitised in Belfast, either St Malachy's or St Peter's. The earliest of them (that I could find) was Peter who was baptised in St Malachys in 1857. Their parents were Peter McKay & Mary McAlinden. I cannot find their marriage anywhere. My great grandfather was married in St Peters in 1891. His home address was 88 Servia Street, Belfast, so they'd been in Belfast all that time. Any help would be appreciated.