Flotsam and Jetsam Aren't Just Ursula's Eels

English speakers started using "flotsam," "jetsam," and "lagan" as legal terms in the 16th and 17th centuries. (The earliest evidence of "flotsam" dates from around 1607.) The three words were used to establish claims of ownership to the three types of sea-borne, vessel-originated goods they named. Flotsam was anything from a shipwreck. (The word comes from Old French floter, meaning"to float.") Jetsam and lagan were items thrown overboard to lighten a ship. Lagan was distinguished from jetsam by having a buoy attached so the goods could be found if they sank. In the 19th century, when "flotsam" and "jetsam" took on extended meanings, they became synonyms, but they are still very often paired.