The revenues of the abbey were calculated in the 1860s as being then equivalent to £20,000, or well over 2 million in modern terms (2008), being derived a variety of sources, including the Parishes and churches of Irvine, Kilmarnock, Loudoun Kirk, Dalry, Ardrossan, Kilbirnie, West Kilbride, Dunlop, Stevenston, Beith, Dreghorn, Dumbarton, South and North Knapdale, Kilmory and Kilbride. In the 1540s the abbey had seventeen monks. In the case of Loudoun Kirk, James, son of Lambinus, established the church before 1189. James, a member of a Flemish family, at or soon after its foundation, gave the revenues of Loudoun Kirk, to support the monks of the then newly founded Kilwinning Abbey, and in return a priest (curate) was provided to attend to the spiritual needs of the parishioners.