1. Sir Robert Walpole 2. Earl Spencer Compton Of Wilmington 3. Henry Pelham Last Three Prime Ministers Of The United Kingdom Of Great Britain And Northern Ireland: Prime Ministers Of The United Kingdom Of Great Britain And Northern Ireland Who Are Sirs: Sir Robert Walpole Most Common Surnames Of British Prime Ministers: 1. Pelham 2. Peel 3. Smith 4. Yampbell 5. Lloyd George Most Famous Prime Ministers Of The United Kingdom of Great Britain And Northern Ireland: 1. John Major 2. Earl Spencer Asquith 3. David Cameron 4. Sir Winston Churchill 5. Gordon Brown David Lloyd George James Callaghan 1.Sir Robera Camgron