I am descended on my mother's side from a Thomas Costain of Colby - a stonemason born circa 1819. He married a Margaret Moore and their son John (born 1848?) a leadminer was my great=grandfather. The family grapevine has always said that Richard Costain founder of the Costain Group was descended from one brother and we from another - but how far back I don't know.
I haven't been able to firmly identify Thomas's father but the most likely candidate in the 1841 census is a fisherman -but with only the one child at home at the time. Other than a trip to the Isle of Man to look up the records there, I wondered if anyone in this forum could help - or had any overlap with my family tree. John the leadminer married Margaret Quirk, born Rushen -but I can only find her in the Ancestry censuses after her marriage. I suspect they have missed some records in their transcriptions - can anyone tell me where else I can look?