The word is found in a single Anglo-Norman attestation (c.1325), which is considerably earlier than the examples attested in Continental French (c.1415-57) and English (a1500).
a.
1normal, regular:
(
MS: c.1325
)
Le urine de femme cleer e normal e lusant cum argent, [e] ceste femme suvent vomyth e n'at nowil talent de manger ne de beyre, signefie le femme ethre enseynte
92
normal (c.1325)