1832 – 1882 (October 6)
Brother Possidius McMahon was born in County Monaghan, Ireland, to P. McMahon and Sarah Kelly on January 1, 1832. After immigrating to the United States, he sought admission to the Order and began his postulancy at Villanova on July 16, 1851. He received the habit of the Order on his 20th birthday in 1852.
Brother Possidius made his profession of vows on September 18, 1858 before Commissary General, Patrick Stanton. In 1862 he was sent for a time to Lansingburgh, New York, but later returned to Villanova.
Brother Possidius died at Villanova in the early afternoon of Friday, October 6, 1882 at the age of 50 and was buried three days later, on Monday, October 9th, in the original community cemetery of Villanova.