Circary at the Time: Saxony
Years of Activity: Unknown
Map: None, see below.
There are three Grefrath locations registered in MapQuest, but each of these is in the Nordrhein-Westfalia area, and therefore unlikely to be a location for a daughter house of Tommarp.
Monasticon Praemonstratense: (I, 247)
Approximate modern location: Unknown (n. Germany)
Elm-Number [See Below]: None.
Other Comments: Reportedly a daughter house of Tommarp, but otherwise unknown.
* This listing (and the numbers, with a few adjustments after 1995) is based on the map contained in Kaspar Elm's Norbert von Xanten: Adliger, Ordensstifter, Kirchenfürst, Wienand Verlag, Köln, 1984, page 328-329.