Hello Bernard,
I don't know if it's too late to ask you if you could help with my family dilemma. Is it possible to look up Pavel I Ratner and Julia Rattner or Ratner at 6 Rue Lincoln  8th Arond 75008.
I have little further information .  They left St Petersburg around 1917 due to the revolution and I have this address.   Pavel (Paul)  was born in 1859 in Belarus.  His wife Julia nee Rosenstein was born in Constantinople.  They had 2 daughters whose names were Xenia and Alexandra( Sasha) who may not have been with them. I doubt were living with them .
I would be very grateful to you .
Best Wishes,
Patricia Lane
Sydney
Australia