The given name Ignacy #poland #names

Nicole Berline

What was the jewish given name corresponding to the polonized name
Ignacy, in Warsaw around 1900 ?
Nicole Berline, France . ROTENSTEIN, Warsaw.

Bernard Flam

Hi from Paris,
Dear Nicole,
When Jews choose to switch their Hebraic / Yiddish given name to a more common name in their country of residence, they often kept the first letter as a reminder.
The same when the given name was given to a baby of a following generation.

So Ignacy was often from Isaac / Yitzchok or Isaia, as Bernard is from Baruch, Serge from Saul, Cesia from Czarna, etc.
May I add that I manage a free weekly workshop of Jewish genealogy from Yiddishland roots by Zoom on behalf of  Medem Center of Paris.
Bernard Flam
Archives & history of Medem Center - Arbeter Ring (Bund / Worker Circle of France)