Casimir Polemus is the name of a man supposedly involved in three separate shipwrecks, being the sole survivor of each.

He was born in Ploërmel, France in the 19th century.

• He sailed with the Jeanne Catherine, which was wrecked off Brest on July 11, 1875.
• Five years later, he again sailed on the Trois Frères, which was wrecked in the Bay of Biscay on Sept 4, 1880.
• Two years later, he again sailed on L'Odéon, which was wrecked off Newfoundland on Jan 1, 1882.

Ripley's Believe It or Not reported the legend, assuming that it was true.^[1]