As far as I can figure out, my great-grandfather Louis Rotbard (rothbart, Rotbart, Rothart, Rudbard)married a woman with the last name of Katz (Kac) in Zyrardow/Zhiraduv in 1902. I don't think she ever made it out of what is now Poland but was then Russia. They had two children Chaja/Ida and Abram/Abraham.
Louis emigrated to the USA in 1910. His children came in 1920. He lived with a family named Katz, (who I knew) and is listed on the 1920 census as 1. Their brother in law and 2. Widowed. I don't have his Ellis Island immigration records but I have Abraham's (my grandfather) and she was not on the boat with them in 1920, so I believe she died between 1909 (when she gave birth to Chaja/Ida) and 1920, most likely in Russia/Poland. Does anyone read Cyrillic?