Piggling, I found an article naming Winston Churchill's mother as Jenny Jacobson so didn't think I was on the right track at all. Thanks also for number 16.
The quiz sheets are coming in steadily. Each one is marked & all-correct entries have a numbered raffle ticket stapled to them. The other half of the raffle ticket is kept in a large envelope ready for the draw on the day following the closing date. The tickets are folded & our Rector pulls out a winner in Church before morning service.
Every correct entry has an equal chance & there are plenty of independent observers in Church to see that all is fair. No need to worry!