Louis Cyr (born Cyprien-Noé Cyr; October 10, 1863 – November 10, 1912) was a French Canadian strongman with a career spanning the late 19th and early 20th centuries.

Marie Frances Van Schaack (June 3, 1917 – January 29, 1999), known professionally as Lili St. Cyr, was a prominent American burlesque dancer and stripper..

The (also known as the roue Cyr, mono wheel, or simple wheel) an acrobatic apparatus that consists of a single large ring made of aluminum or steel with a diameter approximately taller than the performer.