Thomas West, 3rd Baron De La Warr, was an English nobleman, for whom the bay, the river, and, consequently, a Native American people and U.S. state, all later called "Delaware", were named. A member of the House of Lords, from the death of his father in 1602 until his own death in 1618, he served as the governor of Virginia from 1610 to 1611.

Delaware Bay is the estuary outlet of the Delaware River on the northeast seaboard of the United States, lying between the states of Delaware and New Jersey. It is approximately 782 square miles (2,030 km2) in area, the bay's freshwater mixes for many miles with the saltwater of the Atlantic Ocean.