Yes you are a great detective.
My great grandmother seemed to have three names: Sheba, Sophia and on her death certificate Hilda
Were there more children after Harold? Frank and Barnet
What happened to Sheba? I cannot see a death for her.
Have you found Sam and Sheba in the 1939 Register on Findmypast? Can't find them as you have to pay. I am already a paid member of Ancestry.co.uk. Many 4/6 cousins listed on there.
Name: Hilda Polinsky
Death Age: 78
Birth Date: abt 1879
Registration Date: Dec 1957
Registration district: Salford
Inferred County: Lancashire
Volume: 10f
Page: 559
To be honest, if there was a peremptory change of name (in error) then it is likely to be virtually impossible to trace the original. But you never know, there may be something - which is why it would be helpful to fill in the gaps as much as possible.
I do wonder though - even if a form was filled in wrongly at the port, why would that have changed Samuel’s identity? And how would he even have known about it, if he couldn’t read the relevant document? Family stories can get a bit convoluted over the years, which is why we ask rather searching questions
