Nicolas Siouffi (1829 (Damascus) - 1901 (unknown)) was a Kurdish Yazidi, and later French citizen and Vice-Consul at Mosul, remembered for his study of surviving Sabians - a monotheistic religion mentioned in the Quran - Études sur la religion des Soubbas ou Sabéens, leurs dogmes, leurs moeurs (Paris: Imprimerie Nationale, 1880). Siouffi claimed to have identified 4,000 Sabians in the Soubbhas. This was well received by the theosophist G. R. S. Mead, but received highly critical reviews from scholars, accusing Siouffi of ignorance and his teacher of dishonesty.
- G. R. S. Mead Gnostic John the Baptizer: Selections from the Mandaean John-Book p137 "... the French Vice-Consul at Mosul, estimated them at some 4000 souls in all ( Etudes sur la Religion des Soubbas ou Sabéens, Paris, 1880). These were then to be found chiefly in the neighbourhood of Baṣra aud Kút. Siouffi's estimate, "
- The Edinburgh review 1880 Sydney Smith "Admitting M. Siouffi's ignorance and his teacher's possible dishonesty, these are scarcely sufficient to account for the origin of all the traditions and beliefs described in the * Etudes sur la religion ' des Soubbas. ..."
- Les chrétiens aux bêtes: souvenirs de la guerre sainte proclamée ... - Page 240 Jacques Rhétoré, Joseph Alichoran - 2005 "Voir la lettre du consul de France, Nicolas Siouffi, datée du 23 février 1880, citée dans DE VAUCELLES, p. 67-69"