Martin Quigley, Jr (1944). Great Gaels: Ireland at Peace in a World at War. p. 18. „Eamon de Valera is An Taoiseach or "boss Gael." That title goes considerably beyond the English "prime minister" or the American "president." It is the Gaelic equivalent of the German "Fuehrer," the Italian "Duce" and the Spanish "Caudillo.“
Administration – Volume 18. Institute of Public Administration (Ireland). 1970. p. 153. „... and let alone the names of the Prime Minister (the Taoiseach, a word that is related to Duce, Fuhrer, and Caudillo) (translated from the original Irish: ... agus fiú amháin ainmeacha an Phríomh-Aire (An Taoiseach, focal go bhfuil gaol aige le Duce, Fuhrer, agus Caudillo)“
John-Paul McCarthy (2010-01-10). „WT became the most ruthless of them all“. Irish Independent. Nuoroda tikrinta 2020-08-13. „While Taoiseach itself carried with it some initially unpleasant assonances with Caudillo, Fuhrer and Duce, all but one of the 12 men who wielded the prime ministerial sceptre have managed to keep their megalomaniacal tendencies in check.“