The variants quatorisme and quatorizme have occasionally been interpreted as deviant readings of quatorzisme (‘fourteenth’), for example in Gaunt¹ i 139 the editor dates a document to the '14th of July' and not to the '4th'. Although such an interpretation is not out of the question, the form quator + isme/izme (i.e. lacking an s or z sound after the r of quator), seems closer to this relatively rare (compared to quart¹) ordinal numeral quatrisme.