Heinsius, Anthony, a noted Dutch statesman, born at Delft; became Grand Pensionary of Holland; was the intimate friend and correspondent of William III. of England, who left the guidance of Dutch affairs largely in his hands (1641‒1720).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Heineccius, Johann Gottlieb * Heir Apparent