Elizabeth and the Earl of Essex.
Henry II. and Thomas Becket.
Henry VIII. and Cardinal Wolsey.
Newman (J.H.) and Whately.
Wesley and Whitefield.
Other examples in other histories might be added; as
Brutus and Cæsar.
Innocent III and Otho IV. (See Milman: Latin Christianity, vol. v. p. 234.)
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Friendships Broken from Infoplease: