Isaac Nieto (1702–1774) (יצחק ניטו) was Ḥakham of the Portuguese congregation Sha'are Hashamayim, Bevis Marks, London, and the son of David Nieto. In 1749 Nieto became Gibraltar's first Rabbi when he travelled to Gibraltar from London and established the Shaar Hashamayim congregation. His prayer-book in two volumes: Orden de las Oraciones de Ros Ashanah y Kipur (London, 1740) and Orden de las Oraciones Cotidianas, Ros Hodes Hanuca y Purim (London 1771) was the basis of all subsequent translations (e.g., those of Isaac Pinto and of Aaron and David de Sola).

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