William Foster, D.D. (3 July 1744 – November 1797) was a Church of Ireland bishop.
The younger son of Anthony Foster, Chief Baron of the Irish Exchequer,  and his first wife Elizabeth Burgh, he was chaplain to the Irish House of Commons (1780–89), then successively Bishop of Cork and Ross (1789–1790), Bishop of Kilmore (1790–1796) and Bishop of Clogher (1796–1797). 
He was the younger brother of John Foster, 1st Baron Oriel.
Foster married Catharina-Letitia (died 23 November 1814) daughter of Rev. Dr. Henry Leslie (1719–1803), LLD, of Ballibay, co. Monaghan. (Leslie, a scion of the family of the Earl of Rothes, was Prebend of Tullycorbet and then of Tandragee. His father, Rev. Peter Leslie, was rector of Ahoghill, and had married Jane, daughter of Most Rev. Dr. Anthony Dopping, Bishop of Meath). They had two sons, including John Leslie Foster, and five daughters. He was father-in-law of Jerome, 4th Count de Salis-Soglio. He was grandfather of Sir William Foster Stawell, William Fane De Salis and John Warren, 3rd Baron de Tabley.
One of his first cousins married Elizabeth Hervey, a.k.a. Lady Bess Foster, a.k.a. Elizabeth, Duchess of Devonshire.
John Mortimer Brinkley was the first Royal Astronomer of Ireland and later Bishop of Cloyne. He was President of the Royal Irish Academy (1822–35), President of the Royal Astronomical Society (1831–33). He was awarded the Cunningham Medal in 1818, and the Copley Medal in 1824.
The Rt Rev. and Hon. Percy Jocelyn was Anglican Bishop of Clogher in the Church of Ireland from 1820 to 1822. He was forced from his position due to being caught in homosexual practices, which had been outlawed under the Buggery Act 1533.
John Foster, 1st Baron Oriel PC (Ire) was an Anglo-Irish peer and politician, who served as Chancellor of the Exchequer of Ireland and as the last Speaker of the Irish House of Commons (1785–1800).
John Leslie Foster, FRS was an Irish barrister, judge and Tory Member of Parliament (MP) in the United Kingdom Parliament. In 1830 he was appointed a Baron of the Court of Exchequer of Ireland.
Lord John George de la Poer Beresford was an Anglican archbishop and Primate.
James MacManaway was an Anglican bishop.
Jerome de Salis, Count de Salis-Soglio, DL, JP, FRS, Illustris et Magnificus, was an Anglo-Grison noble and Irish landowner.
Charles Frederick D'Arcy was a Church of Ireland bishop. He was the Bishop of Clogher from 1903 to 1907 when he was translated to become Bishop of Ossory, Ferns and Leighlin before then becoming the Bishop of Down, Connor and Dromore. He was then briefly the Archbishop of Dublin and finally, from 1920 until his death, Archbishop of Armagh. He was also a theologian, author and botanist.
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George Montgomery (1562–1621) was a Scottish protestant cleric, promoted by King James VI and I to various Irish bishoprics. He held the offices of Rector of Chedzoy, Somerset; Dean of Norwich (1603); Bishop of Raphoe, Bishop of Clogher, Bishop of Derry (1605); and Bishop of Meath (1610).
St. George Ashe, D.D. was an Irish mathematician and university administrator who, in the late 17th and early 18th centuries, served as Church of Ireland Bishop of Cloyne, Clogher and Derry, in succession. From 1657 to 1718 he was the Donegall Lecturer in Mathematics at Trinity College Dublin. He is remembered now chiefly for his alleged role in performing a secret marriage between Jonathan Swift and Esther Johnson (Stella).
John Garnett (1707/08–1782) was an English bishop of Clogher in the Church of Ireland.
Maurice Day was an Anglican bishop in the early 20th century.
James Dillon (1738–1806) was an Irish Roman Catholic Bishop of Kilmore from 1800 to 1806.
John Porter was an 18th-century Anglican bishop in Ireland.
Sir John Hotham, 9th Baronet, DD (1734–1795) was an English baronet and Anglican clergyman. He served in the Church of Ireland as the Bishop of Ossory from 1779 to 1782 and Bishop of Clogher from 1782 to 1795.
Henry Jones was the Anglican Bishop of Clogher and Bishop of Meath.
James Spottiswood was a Scottish courtier and Protestant bishop of Clogher.
George Tottenham was Dean of Clogher from 1900 to 1903.
Sir Francis Head (1693–1768), 4th Baronet (1721–68) of Head baronets was an Anglican clergyman and landowner, of The [Great] Hermitage, Higham, in Kent. He was the younger brother of Sir Richard Head (1693–1721), 3rd Baronet (1716–21) who died unmarried, and from whom Sir Francis inherited his title.