The father of Vivion de Valera led the introduction of what document?
Vivion de Valera Vivion de Valera (13 December 1910 – 16 February 1982) was an Irish scientist, businessman, lawyer and politician. He was the eldest child of Éamon de Valera and Sinéad de Valera and was named after his paternal grandfather, Juan Vivion de Valera.
Gratian the Elder Gratian the Elder ( ; Latin: "Gratianus Funarius" ; "Gratianus Major", "Gratian the Elder") was an Illyrian soldier of the Roman Empire who flourished in the 4th century. He was the father of Roman Emperors, Valentinian I and Valens, founders of the Valentinianic Dynasty.