The “ineffable name” doctrine, a doctrine that teaches we should not pronounce our Heavenly Father’s Name, appears as early as the 150 AD/CE in the works of Justin Martyr, a Samaritan convert to Christianity.
Justin made a special point about his many discussions with the Jews, discussions which apparently greatly influenced his own thinking in regard to the use of the name Yahweh:
“And all the Jews even now teach that the nameless God spoke to Moses.” (I Apol., 63)
Justin voices these opinions:
“For God cannot be called by any proper name” (Justin’s Hortatory Address to the Greeks, 21)
“For no one can utter the name of the ineffable God; and if any one dare to say that there is a name, he raves with a hopeless madness.” (I Apol.,61)
Question: did Yahweh Himself rave with hopeless madness when He said “This is my name for ever, and this is my memorial unto all generations.” in Exodus 3:15?
Was the psalmist raving with hopeless madness when saying “I will take the cup of salvation, and call upon the name of Yahweh.” in Psalm 116:17?
This is among many false doctrines creeping into Christianity during in this era. We should return to the doctrine found in the scriptures.