Thomas Mathias Lenihan

Born in Mallow, County Cork, Ireland, Lenihan was educated at St. Thomas College in Bardstown, Kentucky, St. Vincent's Seminary in Cape Girardeau, Missouri and St. Francis Seminary in Milwaukee, Wisconsin. He was ordained a Catholic priest for the Diocese of Dubuque, Iowa on November 19, 1868. He was involved in parish ministry while a priest in the diocese, and later, archdiocese of Dubuque.[1] In addition to his brother, Thomas also had a sister, Katherine Kelly (née Lenihan).

On November 30, 1896 Pope Leo XIII named him the second bishop of Cheyenne. He was consecrated a bishop on February 24, 1897 by Archbishop John Hennessy of Dubuque. The co-consecrators were Bishops Henry Cosgrove of Davenport and Thomas Bonacum of Lincoln.[2] The Cheyenne diocese had been without a bishop for almost four years when his predecessor, Bishop Maurice Francis Burke, left to become bishop of Saint Joseph, Missouri. Bishop Lenihan, however, was a man of poor health that was made worse by Wyoming's high altitude and dryness. He was restricted in what he could accomplish and returned to Iowa where he died. He was the bishop of the diocese for 5 years.[3]