The title Viscount Cobham is a Viscountcy in the Peerage of Great Britain. The title was created for Richard Temple, who died without male issue. Rather than becoming extinct, the title passed to his sister under a special "remainder" granted in the letters patent creating the viscounty.
The present Viscount Cobham holds the subsidiary title of Baron Lyttelton, after Charles George Lyttelton, then 5th Baron Lyttelton, succeeded as the 8th Viscount following the death of the 3rd Duke of Buckingham and Chandos in 1889.
Other titles held with the Viscountcy are: Baron Cobham of Kent (created 1718), Baron Westcote (1776), Baron Lyttleton of Frankley (1794) and Baron Frankley (1794). All are in the Peerage of Great Britain except for the Barony of Westcote, which is in the Peerage of Ireland.
f.l.t.r.: The Marquess of Dorset, Earl of Northumberland, Earl of Surrey, Earl of Shrewsbury, Earl of Essex, Earl of Kent, Earl of Derby, Earl of Wiltshire.
Also, due to the association of earls and shires, the medieval practice could remain somewhat loose regarding the precise name used: no confusion could arise by calling someone earl of a shire, earl of the county town of the shire, or earl of some other prominent place in the shire; these all implied the same.
The eldest son of an Earl generally bears the courtesy title of Viscount or Lord; one refers to a younger son of an earl as the Honourable [Forename] [Surname] and to a daughter as Lady [Forename] [Surname] (Lady Diana Spencer furnishing a well-known example).