memorate
an oral narrative from memory relating a personal experience, especially the precursor of a legend.
An undemonstrable legend is no legend at all. One must postulate that every fabulate is based on a memorate.
Where it comes from
From Latin memorātus, past participle of memorāre (“to bring to remembrance, mention, recount”), from memor (“remembering”); see memory.
Adapted from the Wiktionary entry memorate (CC BY-SA 4.0).