Hi Sue, his name is barely discernible on his marriage certificate. Just his name, age and occupation.
His date of birth comes from a member's register for a church in Lichtenburg, then Transvaal, South Africa.
The Gorry / Isle of Man link comes from a DNA test which matched Alan Charles Gorry whose family hailed from Peel, German, Isle of Man. Who posted here regularly.
Then there's the recent autosomal DNA match to Theresa Corris, also from Isle of Man.
I don't know the parent's names, however, according to the traditional naming pattern common in South African / Afrikaans families, his mother's name may have been Mary or Mary Sophia. His father's name may have been William Jacob. That's based purely on naming convention though and could be completely wrong.