"The Ormonius" is a five-book heroic poem of nearly 4,000 hexameters on the military career of the 10th Earl of Ormond, Thomas Butler, written by Ormond's fellow-Irishman and Oxonian, the doctor Dermot O'Meara. It was published in London by Thomas Snodham in 1615. Two editions of the poem appeared, the second with corrections, though very few copies of either printing are now extant.