Peter Bailey Williams (August 1763 – 22 November 1836) was a Welsh Anglican priest and amateur antiquarian.
[2][3] He was ordained in 1788 and served in Eastleach Martin (Gloucestershire), Swinbrook and Burford (both in Oxfordshire) before becoming rector of Llanrug and Llanberis in Caernarfonshire, north Wales, holding these posts until his death on 22 November 1836.
His son, Henry Bayley Williams, later became rector of Llanrug and Llanberis.
[2] In addition to his parish duties, Williams wrote for journals and assisted both young and more established writers with historical information for their work.
He copied several manuscripts of medieval poems, but his antiquarian work was not highly regarded.