This is not about misremembering names. That's only a distraction tactic.

There are rakes of similar transitions where major tunes have minor/modal versions that coexist under either the same or different names, O'Neill's G version of the Cliffs of Moher happily coexists with various other versions, the Steampacket goes minor and becomes Brendan McMahon's. That sort of thing. Musicians making the most of the same basic melodic material. Also on this thread, Junior Crehan turning existing tunes, or 'developing' if you like, into 'compositions' by using his own creativity.