John Chylmarke (Lat. Chilmarcius)
From BiblePortal Wikipedia
John Chylmarke (Lat. Chilmarcius) [1]
Chylmarke (Lat. Chilmarcius), John
an English philosopher, who flourished in 1390, was born at Chylmark, Wiltshire; educated at Merton College, Oxford; became a diligent searcher into the mysteries of nature; an. acute thinker and disputant; but most remarkable for his skill in mathematics, being the author of many tractates in that science. See Fuller, Worthies of England (ed. Nuttall), 3:334.