Edward Allen Sydenham (1873–1948) was a British vicar and numismatist, specialising in Roman coins.
Aged 17, he was a pupil of the Reverend Edward Ebenezer Crake, rector of Jevington in Sussex.
After retirement, the family moved to Ivy House, Cowes, Isle of Wight, where he continued his interest in history and numismatics.
He married Ada Lilian Stone on 21 November 1911, their son Eldred St Barbe was born in October 1912.
Sydenham was also a numismatist, and author of works on Roman Republican and Imperial coinage.