Viscount Melbourne was a title created for Peniston Lamb in 1781 in the peerage of Ireland. He had already been made a baron in 1770 and in 1815 he was made an English peer. The second Viscount served as Prime Minister of the United Kingdom, while his brother, the third Viscount, was a dipolmat. The title became extinct on the death of the 3rd Viscount, Frederick Lamb.

Viscounts Melbourne (1781)

• Peniston Lamb, 1st Viscount Melbourne (1748-1829)
• William Lamb, 2nd Viscount Melbourne (1779-1848)
• Frederick James Lamb, 3rd Viscount Melbourne (1782-1853)

Reference

• MELBOURNE, WILLIAM LAMB, 2ND VISCOUNT (1779-1848), 1911 Encyclopedia Britannica; [1]