British explorer and seal hunter who set a record for navigation into the Antarctic and for whom the Weddell Sea is named.

Weddell commanded the sealing brig “Jane” on three Antarctic voyages, the success of the first (1819–21) permitting him to buy a share in the vessel. On the second voyage (1821–22) he visited the island of South Georgia, east of the tip of South America, as well as the South Shetland Islands. In February 1822 he visited and named the South Orkney Islands. On his third voyage (1822–24) he surveyed the South Shetlands and the South Orkneys and then sailed southward in search of new land. Aided by unusually open ice conditions, he reached 74°15′ S in the sea that was later named for him, exceeding Capt. James Cook's record of southernmost exploration by more than three degrees. He left a record of his exploration in A Voyage Towards the South Pole (1825).