Vivion de Valera Vivion de Valera Vivion Laurence de Valera (13 December 1910 – 16 February 1982) was an Irish Fianna Fáil politician, businessman and lawyer who served as a Teachta Dála (TD) from 1945 to 1981. He was the eldest child of Éamon de Valera and Sinéad de Valera. He was named after his paternal grandfather, Juan Vivion de Valera. Born in Dublin in 1910, Vivion de Valera was educated at Blackrock College, University College Dublin (MSc, PhD) and King's Inns. While at UCD, he was auditor of the Literary and Historical Society. He was called to the Bar in 1937. After
Éamon de Valera the work of Michael Collins and based on three sources: British oaths in the dominions, the oath of the Irish Republican Brotherhood and a draft oath prepared by de Valera in his proposed Treaty alternative, "Document No. 2"). De Valera began a legal case to challenge the requirement that members of his party take the Oath, but the assassination of the Vice-President of the Executive Council (deputy prime minister) Kevin O'Higgins on 10 July 1927 led the Executive Council under W. T. Cosgrave to introduce a Bill on 20 July requiring all Dáil candidates to promise on oath that if