(Isaac), a celebrated French Protestant divine, born in 1647, at Vassy in Champagne, where his father was minister. The revocation of the edict of Nantes obliging him to quit France, he took refuge first at Heidelberg, and then at the Hague, where he procured an appointment in the Walloon church. Here he continued till that capital was taken by the king of Prussia, who, hearing him preach, made him his French minister in ordinary at Berlin; to which city he removed in 1702. While he lived at Berlin, he entered into a warm controversy with M. Bayle on the doctrine advanced in his dictionary favouring manichæism, which continued until death imposed silence on both parties: and it was in this dispute that M. Jaquelot openly declared in favour of the Remonstrants. He wrote, among other works, 1. Dissertations sur l'existence de Dieu. 2. Dissertations sur le Messie. 3. Lettres a Messieurs les Prelats de l'Eglise Gallicane. He was employed in finishing an important work upon the divine authority of the holy scriptures, when he died suddenly in 1708, aged 61.