Gerard, a learned divine of the reformed religion, was born at Amsterdam in 1626, and was successively minister in several places of the Netherlands. He wrote some works, particularly A History of the Reformation of the Netherlands, Amsterdam, 1671-74, in 2 vols. 4to; The Life of Admiral Ruyter; An Account of the Trial of Barneveld, Hoogerbechts, and Grotius, in 1618.