Sigismund Casimir Vasa, was a Polish prince and the only legitimate son of King Wladislaus IV and his first wife Queen Cecilia Renata. He was named after his grandfather Sigismund III, and uncle John Casimir.
- Occupation
- aristocrat
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- April 1, 1640
- Died
- August 9, 1647
