Mandaeism
Mandaeans maintain that Jesus was a mšiha kdaba "false messiah" who changed the teachings given to him by John. The Mandaic word k(a)daba, however, comes  from two roots: the first root, meaning "to lie," is the one traditionally given to Jesus; the second, meaning "to write," might provide a second meaning, that of "book". Some Mandaeans, who are motivated perhaps by an ecumenical spirit, maintain that Jesus was not a "lying Messiah" but a "book Messiah". The "book" in question presumably being the Christian Gospels. This seems to be a folk etymology without support in the Mandaean texts.