The Earl holds the subsidiary title of Baron Guilford (1683), in the Peerage of England. The heir-apparent to the earldom uses the courtesy title of Lord North.
Barons Guilford (1683) Francis North, 1st Baron Guilford (1637-1685) Francis North, 2nd Baron Guilford (1673-1729) Francis North, 3rd Baron Guilford (1704-1790), became Earl of Guilford in 1752 Earls of Guilford (1752) Francis North, 1st Earl of Guilford (1704-1790) Frederick North, 2nd Earl of Guilford (1732-1792) George Augustus North, 3rd Earl of Guilford (1757-1802) Francis North, 4th Earl of Guilford (1761-1817) Frederick North, 5th Earl of Guilford (1766-1827) Francis North, 6th Earl of Guilford (1772-1861) Dudley Francis North, 7th Earl of Guilford (1851-1885) Frederick George North, 8th Earl of Guilford (1876-1949) Edward Francis North, 9th Earl of Guilford (1933-1999) Piers Edward Brownlow North, 10th Earl of Guilford (b.1971)
