Lady Diana Howard (died 1770) (1723–1770) Parents Henry Howard, 4th Earl of Carlisle Lady Frances Spencer Children Anne Duncombe unknown daughter Duncombe Siblings Henry Howard Anne Howard Frances Howard Juliana Howard Frederick Howard, 5th Earl of Carlisle Robert Howard, Viscount Morpeth Lady Arabella Howard Charles Howard, Viscount Morpeth Lady Elizabeth Howard Partners Thomas Duncombe