Howard’s Whig pedigree was impeccable. A nephew of Frederick Howard, 6th earl of Carlisle, his mother was the sister of the Whig statesman John Lambton, 1st earl of Durham. He was also related to the duke of Norfolk.
It seems likely that Howard owed his candidacy for Youghal to the intervention of his cousin George Howard (Lord Morpeth), then Irish Chief Secretary, who overrode the claim of William George Cavendish, a kinsman of the duke of Devonshire. Four weeks before the election Howard married Lady Fanny Cavendish, the sister of William Cavendish, 2nd earl of Burlington, who, in 1858, was to succeed his cousin as 7th duke of Devonshire.
Howard served as private secretary to Morpeth, when 7th earl of Carlisle, during his administrations as viceroy of Ireland in 1855-8 and 1859-64.
