The deviant form, ourser, found in the B manuscript of boz Cont (instead of ourse) has an -er suffix that cannot be explained: 'Lui ourse (var. Ourser) nous aprent coment lui maufee amene la gent' boz Cont 126. Oursier is found in FEW ursus 14,65b, meaning ‘a dog trained for hunting bears’ (cf. TL orsier 6,1308 and DEAF ors (orsier)), which hardly seems applicable here. The form may be the result of a rhotacization or a transmission error of oursel (cf. ursel) or ourset (cf. TL orset 6,1307), referring to a young bear.