Hello Joanne from lockdown in Paris,
Concerning names spelling, always remember that our ancestors left Yiddishland countries to other places : there, their name was phonetically transposed from Russian, Polish or Yiddish pronunciation to French, English, Italian or Spanish.
So branches of our familes got different spelling from same original names.
Your initial question was very interesting and you / we get a lot of amazing trees.
May I attach one mor from a DNA genealogy website.
Take care, abi gezunt
Archives & history of Medem Center - Arbeter Ring (Workmen Circle) of France