Frank Hugh O'Donnell (also Frank Hugh O'Cahan O'Donnell), born Francis Hugh MacDonald (9 October 1846 – 2 November 1916) was an Irish writer, journalist and nationalist politician.
O'Donnell was born in an army barracks in Devon, England, where his father, Sergeant Bernard MacDonald, was stationed. His mother, Mary Kain, was a native of Ballybane, close to Galway city in Ireland. He was educated at the Erasmus Smith School in Galway, St. Ignatius College (the "Jes"), and later enrolled in Queen's College Galway, where he studied English literature, history and political economy. While a student at the college, he acquired a considerable reputation as an orator, and was a frequent contributor to meetings of the college's Literary and Debating Society, of which he became vice-auditor for the 1864–1865 session.
Even in his student days, O'Donnell seems to have been quick to voice his opinions, and revelled in controversy. In November 1866, addressing the Literary and Debating Society on the question "Was the character of Warren Hastings as Governor-General of India praiseworthy?", O'Donnell caused uproar by denouncing "the principle and the system which have lain at the root of the international and intercolonial policy of England, from the days when Elizabeth, the Infamous, chartered for profit two of the first ships which opened the African slave trade...". His remarks caused the chairman of the meeting, Professor Thomas Moffett, to prevent O'Donnell from continuing his speech, stating that "such an epithet ought not to be applied to any predecessor of our present gracious Queen." O'Donnell regarded such action as an unwarranted restriction on his freedom of speech, and in a letter published in the local press gave an early example of his high-flown literary style:
"I hold that Debating Societies are the nurseries of independent thought, and the training schools of sober criticism. I believe in the power and impartiality of an enlightened studenthood ... I have followed the mind of Austin. I have sat at the feet of Cairnes. I have drunk of the philosophy of Mill. I claim for Judicial Science, for Economic Science, for the Philosophy of History, a place in the discussions of our society, I pity and I scorn the formidable confederacy of fools who dare not call a spade a spade."