supposititious

… the said pretended Testament was supposititious, & contriued by such as meant to defraud both the heires female of the said king Henrie the 8. as well as these of his eldest sister …

His good sense had pointed out to him the artifices of the monks, and the gross absurdity of their miracles, wonders, and supposititious reliques.

You might hope to get some other nonsensical belief into the head of George Gradgrind, or Augustus Gradgrind, or John Gradgrind, or Joseph Gradgrind (all supposititious, non-existent persons), but into the head of Thomas Gradgrind—no, sir!