Jacoba of Loon-Heinsberg (died after 1468), was a noble woman from the Low Countries who was the abbess of Thorn Abbey from 1446 to 1454.
[1] She was the daughter of John II of Loon and her half-brother, Jan van Heinsberg, was bishop of the Prince-Bishopric of Liège.
Wybren Scheepsma posits that she likely read Ruusbroec's Vanden twaelf beghinen ("The twelve beguines", ca.
1365), part of which "constitutes a sort of breviary of the Passion", the last day of Christ organized by the eight liturgical hours.
Scheepsma further posits that the Bethany practice of copying and meditating was representative of the "spiritual exercises" of the Congregation of Windesheim; both Bethany and Windesheim belonged to that Augustinian congregation and received nuns from the "mother convent" in Diepenveen.