What is "goscelin"

Goscelin of Saint-Bertin (or Goscelin of Canterbury) was a Benedictine hagiographical writer. His date of birth is unknown, but it cannot have been later than the early 1040s. He was a Fleming or Brabantian by birth and became a monk of St Bertin's at Saint-Omer before travelling to England to take up a position in the household of Herman, Bishop of Ramsbury (1058–78). During his time in England, he stayed at many monasteries and wherever he went collected materials for his numerous hagiographies of English saints.