Sinéad Flanagan's first name was originally Jane, but she changed it to its Gaelic equivalent later in life. She trained as a teacher at Leinster College, where she met her future husband, Eamon de Valera, then a mathematics teacher. In 1910, they were married and had seven children. Sinéad de Valera played no part in her husband's public life. He was often away from home during the early years of the marriage; and after the 1916 Easter Rising against the British, while her husband was in prison or forced to remain abroad, Sinéad devoted herself to family life. A supporter of the Gaelic League, she produced over a dozen plays for children, the first of which was Buaidhirt agus Brod (1934). She also published several collections of stories such as Fairy Tales of Ireland (1967). Sinéad was the First Lady of the Republic of Ireland in 1959-1973, during the years her husband was President.