Frederick Lambart

Frederick Lambart may refer to:
 * Frederick Lambart, 8th Earl of Cavan (1815–1887)
 * Frederick Lambart, 9th Earl of Cavan (1839–1900), Irish soldier and politician
 * Rudolph Lambart, 10th Earl of Cavan (Frederick Rudolph Lambart, 1865–1946), British Army officer