My wife's grandfather Waclaw Bartold had a sister Wiktoria. She married Ostrowski or Osowski and they came to USA after 1900 and settled in Chicago. They owned a store with textiles and had two daughters. Wiktoria's another sister name was Kornelia but she lived in Poland.
They were from Ciechanow area.
Waclaw and his wife Genowefa (Gogolewska) tried to joint his sister family in Chicago in 1913 but he was turned back from
Ellis Island due to poor health.