This is interesting:
"The restriction upon communicating the Name proper probably originated in Oriental etiquette; in the East even a teacher was not called by name. For naming his master Elisha, Gehazi was punished with leprosy (II Kings viii. 5; Sanh. 100a). After the death of the high priest Simeon the Righteous, forty years prior to the destruction of the Temple, the priests ceased to pronounce the Name (Yoma39b). From that time the pronunciation of the Name was prohibited. "Whoever pronounces the Name forfeits his portion in the future world" (Sanh. xi. 1). Hananiah ben Ṭeradion was punished for teaching his disciples the pronunciation of the Name ('Ab. Zarah 17b). It appears that a majority of the priests in the last days of the Temple were unworthy to pronounce the Name, and a combination of the letters or of the equivalents of the letters constituting the Name was employed by the priests in the Temple. Thus the Twelve-Lettered Name was substituted, which, a baraita says, was at first taught to every priest; but with the increase of the number of licentious priests the Name was revealed only to the pious ones, who "swallowed" its pronunciation while the other priests were chanting. Another combination, the Forty-two-Lettered Name, Rab says, was taught only to whomever was known to be of good character and disposition, temperate, and in the prime of life (Ḳid. 71a; comp. Rashi to 'Ab. Zarah 17b). Maimonides, in his "Moreh," thinks that these names were perhaps composed of several other divine names."
Oh which I've no doubt that you will see him in person