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.
Valentí Almirall i Llozer Valentí Almirall i Llozer (] ; Barcelona, 8 March 1841 – 1904) was a Catalan politician, considered one of the fathers of modern Catalan nationalism, and more specifically, of the left-winged nationalism.