William Beresford, 1st Baron Decies, Church of Ireland Archbishop of Tuam, is born on April 16, 1743.

Beresford is the third surviving son, out of eight daughters and seven sons of Marcus Beresford, 1st Earl of Tyrone, and his wife Catherine Power, 1st Baroness de la Poer, the only daughter and heiress of James Power, 3rd Earl of Tyrone and 3rd Viscount Decies. He enters Trinity College Dublin on December 18, 1759, graduating with a Bachelor of Arts in 1763 and Master of Arts in 1766, before becoming a clergyman.

His birth into the politically influential Beresford family affords him a degree of opportunity, and he is made a vice-regal chaplain in 1766. Brother of George de la Poer Beresford, 1st Marquess of Waterford, he marries Elizabeth Fitzgibbon, sister of John FitzGibbon, 1st Earl of Clare, on June 16, 1763. They had three sons and five daughters. These connections, however, do not automatically result in his being promoted to bishop, despite reaching episcopal age in 1773, and he spends several years as a well-beneficed rector of Urney in the Diocese of Derry. The Beresford family complains that he has been overlooked for several episcopal vacancies in the 1770s and it is not until 1780 that he is created Doctor of Divinity and consecrated Bishop of Dromore on April 8, 1780. At Dromore he erects a handsome new episcopal residence. On May 21, 1782, he is transferred to the diocese of Ossory and, as bishop there, takes his seat in the Irish parliament and exercises influence over the ecclesiastical borough of St. Canice.

The death of Primate Richard Robinson in 1794 is the stimulus for a reorganisation within the Church of Ireland hierarchy, and Beresford is one of the candidates rumoured to succeed him. However, his familial ties disadvantage him, because the government does not want to favour one Irish “party” over another. He is instead appointed to the vacant archbishopric of Tuam on October 10, 1794. An influential and senior position within the church, it is worth £5,000 per annum, which is more than Archbishop Charles Agar receives for the archbishopric of Cashel and provides him with extensive patronage.

In the late 1790s Beresford regularly attends parliament, particularly in the crucial session of 1799 as the Acts of Union is debated and shares his brother John’s view that a union is the best means of securing the Protestant interest in Ireland.

In the years following the union Beresford gains a temporal peerage, becoming 1st Baron Decies on December 22, 1812. He is an amiable, kind and loquacious individual, and is patron to artists, including Gilbert Stuart, who produces a portrait of him as Bishop of Ossory. His long years of service within the established church also makes him very wealthy, worth £250,000 at the time of his death.

Beresford dies on September 6, 1819, at Tuam, County Galway, and is succeeded in the barony by his eldest surviving son John on September 8, 1819. His eldest son Marcus had died in 1803. His youngest daughter Louisa, widow of Thomas Hope, marries, by special license, her cousin William Carr Beresford on November 29, 1832. Through Louisa he is a grandfather of British MP and patron of the arts, Henry Thomas Hope.

(From: “Beresford, William” by Martin McElroy, Dictionary of Irish Biography, http://www.dib.ie, October 2009, revised June 2024)