The Earl holds the subsidiary titles of Viscount Cantelupe (1761) in the Peerage of Great Britain, Baron De La Warr (1572) in the Peerage of England, and Baron Buckhurst (1864) in the Peerage of the United Kingdom. The barony De La Warr is of the second creation; however, it bears the precedence of the first creation, 1299.
The state of Delaware is named after the Delaware River which is named after Thomas West, 3rd Baron De La Warr.
Thomas West, 3rd (or 12th) BaronDeLaWarr (July 9, 1577 – June 7, 1618), was the Englishman for whom the state, river, and the American Indian tribe now called "Delaware" (in the United States) were named.
He was the son of Thomas West, 2nd BaronDeLaWarr and Anne Knollys, daughter of Sir Francis Knollys and Catherine Carey.
He succeeded his father as BaronDeLaWarr, in 1602, and became a member of the Privy Council.