Can we draw the following hypothesis from the context?

Context:

Sigismund Casimir, Crown Prince of Poland (Polish: "Zygmunt Kazimierz Waza" ), (1 April 1640 9 August 1647) - was the only legitimate son of King Wadysaw IV and his first wife Queen Cecilia Renata. He was named after his grandfather Sigismund III, and uncle John Casimir.

Hypothesis: Sigismund Casimir lived in Poland.
Yes