Frewer was born in Fulletby, Lincolnshire and was educated at The King's School, Canterbury and Lincoln Theological College. He was ordained in 1909 and, after being a curate in Boston, he emigrated to Australia where he became domestic chaplain to the Bishop of Bunbury-eventually becoming a canon of the diocese. A member of the Brotherhood of St Boniface, he was their warden from 1919 until his ordination to the episcopate. He served as second bishop of North West Australia from 1929 to 1965.
- The Times, 17 December 1974, p17, "Obituary: The Rt Rev John Frewer".
- Crockford's Clerical Directory 1975-76 London: Oxford University Press, 1976 ISBN 0-19-200008-X
- Who was Who 1987-1990: London, A & C Black, 1991 ISBN 0-7136-3457-X
- AOB on-line:Trower,G
- Peter Boyce, 'Frewer, John (1883–1974)', Australian Dictionary of Biography, National Centre of Biography, Australian National University, http://adb.anu.edu.au/biography/frewer-john-10251/text18129, published first in hardcopy 1996, accessed online 22 March 2015
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Howell Arthur John Witt
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