Jessica (The Merchant of Venice) "Il Pecorone" () and Richard Robinson's English translation of the "Gesta Romanorum" (1577), but neither of these contain the Jessica–Lorenzo plot, nor give their Shylock-analogues a daughter. For these elements Shakespeare probably mined Masuccio Salernitano's "Il Novellino" (1476) and Christopher Marlowe's "The Jew of Malta" (). In the 14th story of "Il Novellino" we have most of the elements of the Jessica–Lorenzo plot: a daughter guarded by a rich but miserly father; the lovers eloping with her father's gold and jewels; the father's despair, in equal measures, for the loss of both daughter and treasure; and the lovers' eventual marriage
Jessica (The Merchant of Venice) manipulates her father into giving her responsibility for them; brings them to her tower, and treats them as royalty; does the same for the remaining ten of the Twelve Peers when they are captured too; helps the Peers murder Sir Lucafere, King of Baldas when he surprises them; urges the Peers to attack her father and his knights at supper to cover up the murder; when her father escapes and attacks the Peers in her tower, she assists in the defence; then she converts to Christianity and is betrothed to Guy of Burgundy; and finally, she and her brother, Fierabras