Cuffe is the son of John Otway Cuffe, 2nd Earl of Desart, and Catherine, daughter of Maurice O’Connor. He succeeds in the earldom in November 1820, aged two, on the early death of his father. He is educated at Eton College and enters Christ Church, Oxford in 1836 but takes no degree.
Cuffe marries Lady Elizabeth Lucy Campbell, daughter of John Campbell, 1st Earl Cawdor, in 1842. They have three sons and a daughter. He dies at the age of 46 at his home in Belgravia, City of Westminster, Greater London on April 1, 1865, due to a fall suffered during an attack of paralysis. He is buried in Castleinch Cemetery, Kilkenny, County Kilkenny. He is succeeded in the earldom by his son, William. The Countess of Desart dies in April 1898, aged 76.
Captain Otway Cuffe, benefactor, Gaelic revivalist, twice mayor of Kilkenny and a founder of businesses and organisations to profit the local people, is born in London on January 11, 1853.
Cuffe is born the Honourable Otway Frederick Seymour Cuffe to John Cuffe, 3rd Earl of Desart, and Lady Elizabeth Lucy Campbell. He has an older sister and two older brothers. After the death of his eldest brother William Ulick, 4th Earl of Desart, his seecond eldest brother, Hamilton, becomes the 5th Earl of Desart. As the 5th Earl has no male heirs himself, Cuffe is nominally his heir. However, as he also dies without heirs, the line becomes extinct upon the death of the 5th Earl.
Dedicated to ensuring a strong Irish identity in the area, Cuffe works with his sister-in-law, Ellen Cuffe, Countess of Desart. He joins Conradh na Gaeilge soon after his arrival in Kilkenny. He is elected president of its Kilkenny branch in 1904 and remains so until his death. He is replaced by Lady Desart. Together they open the theatre in Kilkenny in 1902 and he is the first President of the Kilkenny Drama Club. He also performs on stage.
Cuffe is first elected Mayor of Kilkenny in 1907 and again in 1908. With Lady Desart, he builds the Kilkenny Woollen Mills, Desart Hall, the Talbot’s Inch model village and the Kilkenny Woodworkers factory. He lays the foundation stone for Kilkenny’s Carnegie library. He is also President of the Irish Industrial Association.
Cuffe is a friend of William Morris whom he had met on a trip to Iceland. He believes in the Arts and Crafts movement and tries to implement it in the projects which he drives. He is also a friend and supporter of Standish James O’Grady and helps him found the weekly radical conservative paper The All-Ireland Review and runs it between 1900 and 1906.
In 1911, Cuffe becomes ill and is forced to move to warmer climates until he recovers. He decides to go to the south of Europe but then a visit to Australia seems appropriate. However, on the journey there he contracts pneumonia and dies at Fremantle in Western Australia on January 3, 1912. He is buried at Perth, carried to his grave by Kilkenny hurlers. The Kilkenny Moderator calls his death “a thunderbolt to the people of Kilkenny.” He is remembered as a visionary who made a permanent impact on the physical landscape of Kilkenny.