- a black nymphalid butterfly, Melitaea phaeton, characterized by orange-red, yellow, and white markings, common in those areas of the northeastern U.S. where turtlehead, the food plant of its larvae, is found.
- U.S. microbiologist: Nobel Prize in Medicine 1975.
- Sir George Calvert.
- a seaport in N Maryland, on an estuary near the Chesapeake Bay.
- a port in N Maryland, on Chesapeake Bay. Pop: Pop: 628 670 (2003 est)
- David . born 1938, US molecular biologist: shared the Nobel prize for physiology or medicine (1975) for his discovery of reverse transcriptase
- Lord .
