Geert Groote, Dutch preacher, founded the Brethren of the Common Life (b. 1340)
Gerard Groote (October 1340 – 20 August 1384), otherwise Gerrit or Gerhard Groet, in Latin Gerardus Magnus, was a Dutch Catholic deacon, who was a popular preacher and the founder of the Brethren of the Common Life. He was a key figure in the Devotio Moderna movement.