Samuel Willoughby Duffield

Samuel Augustus Willoughby Duffield (1843–1887) was an American clergyman and hymnologist, born in Brooklyn, New York, and a graduate of Yale. He was a Presbyterian minister and held a pastorate at Bloomfield, New Jersey, for most of his career.

He published a volume of poems, Warp and Woof (1870), and the hymnological study English Hymns: Their Authors and History (1886).