Eaton, born in Kent in or about 1575, was educated at Trinity College, Oxford, where he became the first recipient of the newly founded Blount exhibition in 1590.
After serving several curacies, including that of St. Catherine, Coleman Street, London, he was presented about 1604 to the vicarage of Wickham Market, Suffolk, where he continued for fifteen years, 'being accounted by all the neighbouring ministers a grand Antinomian, if not one of the founders of the sect so called'.
At length his heterodox preaching gave offence to his diocesan, and he was deprived of his living 29 April 1619, as being 'an incorrigible divulger of errors and false opinions'.
Anthony a Wood, whose knowledge of his latter days was evidently founded on a misreading of the title-pages and prefaces of his works, erroneously states that Eaton, having been instituted 'in 1625 or thereabouts,’ continued vicar of Wickham Market until his death in '1641,’ and 'was there buried,’ and he has been followed by all subsequent writers.
Strype, in citing portions of an undated letter from John Echard, vicar of Darsham, Suffolk, in 1616, in which mention is made of Eaton and the court of high commission, absurdly refers it to 1575.