John Gilbert (died 1397) was a medieval Bishop of Bangor, Bishop of Hereford and Bishop of St. David's.
Gilbert was nominated to Bangor on 17 March 1372.Fryde, et al. Handbook of British Chronology p. 291
Gilbert was translated to Hereford on 12 September 1375.Fryde, et al. Handbook of British Chronology p. 251
Gilbert was Lord High Treasurer from 1386 to 1389 and then again from late 1389 to 1391.Fryde, et al. Handbook of British Chronology p. 106
Gilbert was translated to St. David's on 5 May 1389 and died on 28 July 1397.Fryde, et al. Handbook of British Chronology p. 297
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