|Died||20 July 1483|
|Residence||Banham, Bixton and Wilby|
Costessey was ordained priest on 15 April 1441. From 1442 to 1472 he was a member of King's Hall, Cambridge. Costessey held livings at Banham, Bixton and Wilby. He was Master of Rushworth College from 1472 to 1475; and then of Gonville Hall from 1475 until his death on 20 July 1483.
- Alumni Cantabrigienses: A Biographical List of All Known Students, Graduates and Holders of Office at the University of Cambridge, from the Earliest Times to 1900, John Venn/John Archibald Venn Cambridge University Press > (10 volumes 1922 to 1953) Part II. 1752–1900 Vol. i. Abbas – Cutts, (1922) p400
- "Biographical History of Gonville and Caius College" John Venn/John Archibald Venn p27: Cambridge; CUP; 1901
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