May a Jew may instruct Christians in Hebrew?
Rabbi Eliyahu Menachem Chalfon
Italian Talmudist and physician; son of the astronomer Abba Mari and son-in-law of Kalonymus ben David (Maestro Calo); flourished at Venice in the middle of the sixteenth century. In a collection of responsa compiled by Joseph Graziano of Modena, Rabbi Chalfon gives his opinion on the question whether a Jew may instruct Christians in Hebrew. Citing numerous passages from the Talmud, Rabbi Chalfon shows that elementary instruction may certainly be given, if only for the purpose of enabling non-Jews to comply with the seven laws given to Noah. Moses Isserles' collection of responsa, No. 56, ed. Cracow