FEW, DMF, TL and DEAFpré all consider this lexeme a graphical variant of pronostique, although etymologically the pre- reflects the use of a different prefix (attested in medieval Latin).
(
c.1150; MS: c.1300
)
queor ki en Deu s'esjoist, Sun vis e sa face enbelist. Ço est seue (=knowledge) prenostiche, E a toz commune phisiche, Ke joie visage enbelist
8831
prenostische (c.1150)