Beauclerk, Topham, a young English nobleman, the only son of Lord Sydney Beauclerk, a special favourite of Johnson's, who, when he died, lamented over him, as one whose like the world might seldom see again (1759‒1780).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Beauclerk * Beaufort, Duke of