 The information on the life and works of William Penbygull (or Penbegyll) is scanty. He was from Exeter diocese; he studied at Oxford, where he was fellow of Exeter College in 1399, and rector in 1406–07. He was licensed to preach in the diocese of Bath and Wells on 28 February 1410. He probably died at Oxford in 1420. According to Emden 1957–59, he wrote the following treatises on logic: De universalibus (On Universals), Divisio entis (The Division of Being), and Super Porphyrii Isagogen (On Porphyry's Isagoge). 