Viscount Sydney is a title that has been created twice. The first creation came in 1689 when Henry Sydney was made Viscount Sydney, of Sheppey, in the Peerage of England

Peerage of England

The Peerage of England comprises all peerages created in the Kingdom of England before the Act of Union in 1707. In that year, the Peerages of England and Scotland were replaced by one Peerage of Great Britain....

. In 1694 he was created Earl of Romney

Earl of Romney

Earl of Romney is a title that has been created twice. It was first created in the Peerage of England in 1694 in favour of the soldier and politician Henry Sydney. He had been made Baron Milton and Viscount Sidney at the same time in 1689. Sydney was the younger son of Robert Sidney, 2nd Earl of...

. For more information on this creation, see this title. The second creation came in 1789 when Thomas Townshend was made Viscount Sydney, of St Leonards, in the Peerage of Great Britain

Peerage of Great Britain

The Peerage of Great Britain comprises all extant peerages created in the Kingdom of Great Britain after the Act of Union 1707 but before the Act of Union 1800...

. His grandson was created Earl Sydney

Earl Sydney

Earl Sydney, of Scadbury in the County of Kent, was a title in the Peerage of the United Kingdom. It was created in 1874 for the Liberal politician John Townshend, 3rd Viscount Sydney. He notably served as Lord Chamberlain of the Household and as Lord Steward of the Household. On his death in 1890...

in 1874. For more information on this creation, see this title.