Education
University of Edinburgh.
Professor of the Practise of Medicine
University of Edinburgh.
Colohan was a native of Ballinasloe, related to William and James Colohan, highly respected doctors practiseing in that town. During the Great Irish Famine, William and James built the town workhouse for the relief of the poor. They were the parents of John Colohan, Frances, William and Nicholas, who was the father of Arthur Colohan (1884–1952).
He graduated Doctor of Medicine from Edinburgh University in 1828 though without a surgical qualification.
Colohan was one of six doctors associated with Galway"s Fever Hospital.
