Ronan Fanning, A Will To Power: Eamon De Valera, Harvard University Press, 2016, p. 3, ISBN 978-0-674-97055-7.
«De Valera was born on 14 October 1882 in the Nursery and Child's Hospital, Lexington Avenue, Manhattan, New York; the only child of Juan Vivion de Valera and Catherine ('Kate') Coll [..] Vivion de Valera had been born in 1853 in Spain's Basque Country»
