The van Steenwyk family papers follow the business interests and personal lives of an early La Crosse banker and mayor, and his family. The papers are categorized into six series, each corresponding to an individual family member: Gysbert van Steenwyk, Sr., his wife Mariette (Nichols) van Steenwyk, their son Gysbert van Steenwyk, Jr. and his wife Grace (Pettingill) Hogan van Steenwyk, and Ella May (van Steenwyk) Cassels, daughter of Gysbert, Sr. and Mariette van Steenwyk. A few miscellaneous items are included in a final series.
