Mechtilde, O.Cist. - Is commemorated the same day (16 November) as her protégée St. Gertrude the Great. - http://www.saintpatrickdc.org/ss/1116.htm#mech
Mechtilde of Hackeborn - Brief biography, by Karen Rae Keck. - http://www2.evansville.edu/ecoleweb/glossary/mechtildeh.html
St. Mechtilde - Born Matilda von Hackeborn-Wippra, blood sister of the Abbess Gertrude von Hackeborn, monastic herself. Quite plausibly the model for Matelda in Dante's "Purgatorio." She died in 1298. - http://www.newadvent.org/cathen/10105b.htm