See "The Ancestors and Descendants of John Copa / Sopa and Elizabeth Trzebiatowska" by Adeline Sopa (1990) for an extensive account of the Trzebiatowski family and their ancestors. You may find it at the public library in Stevens Point and / or at the Wisconsin State Historical Society in Madison. My connection to this family is through Elizabeth's mother, Victoria Bielawa, who was my great-grandmother's older sister.