Granville was the only son of Charles Granville, 2nd Earl of Bath, by his second wife Isabella, sister of Henry de Nassau d'Auverquerque, 1st Earl of Grantham.
John Pulteney was son of Sir William Pulteney, and uncle to William Pulteney, later Earl of Bath.
Bath | Order of the Bath | Bath, Somerset | James Earl Jones | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Herbert Kitchener, 1st Earl Kitchener | University of Bath | Earl | Frederick Roberts, 1st Earl Roberts | Earl of Derby | Earl Warren | Earl of Pembroke | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | Thomas Wentworth, 1st Earl of Strafford | Edward Smith-Stanley, 14th Earl of Derby | Earl of Shrewsbury | William Pitt, 1st Earl of Chatham | Simon de Montfort, 6th Earl of Leicester | Richard Neville, 16th Earl of Warwick | Earl of Leicester | John Scott, 1st Earl of Eldon | Robert Devereux, 2nd Earl of Essex | Robert, 1st Earl of Gloucester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | Earl of Devon | Douglas Haig, 1st Earl Haig | Bath Rugby | My Name Is Earl |
His elder brother, William was one of the leading English statesmen of the 18th century and was eventually created Earl of Bath; he had inherited the family fortune including considerable estates in what is now central London, and also the parliamentary borough of Hedon in Yorkshire.