Sauenap, Meaning of

In the will of Jane Heryng, of Bury, 1419, occurs this bequest:— "To Alyson my dowter, xl s. and ij pottys of bras neste the beste, and a peyr bedys of blak *get*, and a grene hod, and a red hod, and a gowne of violet, and another of tanne, and a towayll of diaper werk, and a *sauenap*; also a cloke and rownd table." What was the *sauenap*?