I forgot to mention, the mother's name should be her maiden name.

Tom

Passempfehlung would be the local authority's approval or recommendation she would need for the issuance of a passport which would be issued by the Swiss Federation, not the local authorities. She probably did this before going to the UK.

Basically I think you have all the information you need to complete your search. I would list it all out and put it in a logical order, then decide on the most likely avenues to pursue.

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