León Ó Broin, senior civil servant, historian, and author, is born Leo Byrne on November 10, 1902 at 21 Aungier Street, Dublin, the second of four sons of James P. Byrne, a potato factor’s bookkeeper, and Mary Byrne (née Killeen), daughter of a seaman who abandoned his family.

After early education in convent school, Ó Broin attends Synge Street CBS, where he is especially adept at languages. After working in several minor clerical employments, he becomes a clerk in the Kingsbridge headquarters of the Great Southern Railway. Joining a local Sinn Féin club, he canvasses for the party in the College Green ward during the 1918 Irish general election. Sent from an early age to Irish language classes by his father, he attends the Irish summer college in Spiddal, County Galway, and joins the Gaelic League, becoming by early 1921 secretary of central branch. He writes articles for the league’s successive weekly organs, each in its turn suppressed by the authorities. Despite regarding such writing as practice work within a language he is yet learning, he is selected best writer of Irish at the 1920 Dublin feis.

Arrested with his father and two brothers just before Christmas 1920 when Black and Tans discover a letter in Irish on his person during a house raid, Ó Broin is imprisoned for several weeks in Wellington Barracks. Leaving his railway job, he works as a clerk in the clandestine office of the Dáil Éireann Department of Agriculture (1921–22). During the Irish Civil War, with departmental work at a standstill, he joins the National Army as a commissioned officer assigned to general headquarters staff at Portobello Barracks. Having recently commenced legal studies at the King’s Inns and University College Dublin (UCD), he handles army legal matters, such as compensation claims for damage to property.

Called to the bar in 1924, Ó Broin enters the civil service. Assigned to the Department of Education (1925–27), he was involved in launching the Irish language publishing imprint An Gúm, intended to redress the paucity of reading material, apart from school texts, in the language. Transferred to the Department of Finance (1927), he serves as estimates officer and parliamentary clerk, and is assistant secretary of the economy committee established by the Cumann na nGaedheal government to make recommendations on reductions in current expenditure. Appointed private secretary to the Minister for Finance (1931–32), he serves both Ernest Blythe and the first Fianna Fáil minister, Seán MacEntee. Promoted to assistant principal (1932), and to principal officer (1939), he represents the department on the Irish Folklore Commission, and serves on the interdepartmental committee that, after the disastrous Kirkintilloch bothy fire in 1937, investigates seasonal migration to Scotland. During the emergency he is regional commissioner for Galway and Mayo (1940–45), one of eight such officers charged with organising contingency preparations for dealing with the likely collapse of central administration in the event of invasion by any of the wartime belligerents.

Transferred out of Finance, Ó Broin becomes assistant secretary (1945–48) and secretary (1948–67) of the Department of Posts and Telegraphs, administering both the postal service and telecommunications. He works closely with Fianna Fáil minister Patrick Little to improve the range and quality of music offered by the broadcasting service, playing a large part in the decision to form and adequately staff a full Radio Éireann symphony orchestra. He represents Ireland in several post-war conferences in Europe and America that reorganise the international regulation of broadcasting activities. He is elected to the European Broadcasting Union‘s administrative council (1953). He establishes and serves on a departmental committee in 1953 that studies all facets of launching a television service.

A devout but liberal Catholic, Ó Broin is prominent for many years in the Legion of Mary, founded by his close friend and civil-service colleague Frank Duff. President of a legion presidium of writers, actors, and artists, he is first editor (1937–47) of the quarterly organ Maria Legionis. Sharing Duff’s ecumenism, he belongs to the Mercier Society, the Pillar of Fire Society, and Common Ground, groups organised by Duff in the early 1940s to facilitate discussion between Catholics and, respectively, protestants, Jews, and secular intellectuals. The first two are suspended amid disapproval by the Catholic Archbishop of Dublin, John Charles McQuaid.

On retirement from the civil service in 1967, Ó Broin concentrates on the parallel career of research and writing that he had cultivated over many years. Having begun writing articles and short stories in Irish from his earliest years in the Gaelic League, he publishes his first collection of short stories, Árus na ngábhad, in 1923. With the establishment of An Gúm, he publishes three more collections of original short stories and translations of such masters of the genre as Alexander Pushkin, Prosper Mérimée, Guy de Maupassant, and Jerome K. Jerome. He translates several popular modern novels, including Robert Louis Stevenson‘s Kidnapped and H. G. Wells‘s The War of the Worlds. Active as secretary, actor, and writer with the state-subsidised Gaelic Drama League (An Comhar Drámaíochta), which produces Irish language plays, he publishes many plays in Irish, both original and translated. His best-selling book in Irish is Miss Crookshank agus coirp eile (1951), about the mummified corpses in the vaults of St. Michan’s Church, Dublin.

Ó Broin writes prolifically on modern Irish history and biography. His Irish language biography of Charles Stewart Parnell (1937), the first full-scale study of its kind in Irish since the commencement of the language revival, is a landmark publication, praised for the quality of its prose by such critics as Frank O’Connor and Seán Ó Faoláin. His biography of Robert Emmet, published in Irish in 1954, and awarded the Douglas Hyde prize, pioneers the scholarly subversion of the romantic myth surrounding its subject, and includes consideration of the political and social context. The subjects of subsequent biographies include Richard Robert Madden, Charles Gavan Duffy, Joseph Brenan, Michael Collins, and Frank Duff.

Ó Broin takes a largely biographical approach to historical writing, researching neglected aspects of pivotal historical events, and basing his studies on previously unexploited primary sources, often the papers of a single individual, whose career serves as the linchpin of his narrative, filtering events through the perspective of that person. Another vein of his scholarship is his primary research into the history of Irish separatism, especially with sources in the Irish State Paper Office.

Ó Broin receives an honorary LL.D from the National University of Ireland (NUI) in 1967. Elected a member of the Royal Irish Academy (RIA) in 1971, he is a council member (1974–76) and senior vice-president (1976–77), and chairs the group whose recommendations results in the academy’s establishment of the National Committee on International Affairs. He is president of the Irish Historical Society (1973–74), and a member of the Irish Manuscripts Commission.

In 1925 Ó Broin marries Cait Ní Raghallaigh, an office assistant reared in Baltinglass, County Wicklow, whom he met in the Gaelic League. They have two sons and three daughters. After residing in the south city suburbs, they move to Booterstown, County Dublin in the 1930s, and from there to the Stillorgan Road in the 1950s.

Ó Broin dies February 26, 1990 in Dublin, and is buried in Deans Grange Cemetery. His papers are in the National Library of Ireland (NLI). His eldest son, Eimear Ó Broin, is an accomplished musicologist and assistant conductor of the several Radio Éireann orchestras (1953–89).

(From: “Ó Broin, León” by Lawrence William White, Dictionary of Irish Biography, http://www.dib.ie)