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.
He was the son of Thomas West, 2nd Baron DeLaWarr and Anne Knollys, daughter of Sir Francis Knollys and Catherine Carey.
He served in the army under Robert Devereux, 2nd Earl of Essex, and in 1601 was charged with supporting Essex's ill-fated insurrection against Queen Elizabeth, but he was acquitted of those charges, succeeded his father as Baron DeLaWarr in 1602 and became a member of the Privy Council.
Lord DeLaWarr headed the contingent of 150 men who landed in Jamestown on 10 June 1610, just in time to persuade the original settlers not to give up and go home to England.