She is perhaps the friend of whom Hadewijch speaks and by her included in the list of the 107 Perfects (Lijst der volmaakten), as an appendage to her 13th Vision.
Already elderly, Aleydis was one of the first beguines to be burned in 1235 (or 1236) by the inquisitor Robert Le Bougre, in Cambrai, because of her “right love” (“om hare gerechte minne“). She was accused of following pantheistic and spiritualistic doctrines. Her execution touched a lot of people as this woman was considered a saint by many, even among high society people.