This substantive is rare in Anglo-Norman, based on the Latin diminutive of hortus, i.e. hortulus. In this single attestation it may even be an error for the more common word cortil, although such an emendation is not necessary.
(
MS: c.1300
)
Nasturcium ortolanum: (A1) gallice kersune de ortil (var. (B1: s.xiv1/4) gallice cresses de curtil vel cardomon; (B2: c.1340) gallice kersoun de curtil, anglice tounkersen)184