Welsh poet and antiquary, one of the principal figures in the mid-18th-century revival of Welsh classical poetry.

After leaving the University of Oxford without taking a degree, he served as curate in various parishes. His first publication, Some Specimens of the Poetry of the Antient Welsh Bards (1764), which contains English translations with historical notes, secured his reputation as a scholar and critic. Much of his own Welsh-language poetry is in the collection Dyddanwch Teuluaidd. Evans' bardic names were Ieuan Brydydd Hir (Evan the Tall Poet) and Ieuan Fardd. In the last decade of his life he was embittered by the loss of a private pension and by the antipathy of the Welsh church to Welsh scholarship.