Calvin Alonzo Irish (1830-1920), the oldest son of Alonzo and Betsey Irish, was a private in the Civil War. He enlisted in Company L of the Vermont 1st Cavalry Regiment in 1862, and served until May 1865, when he was discharged. At that time, Calvin's wife, Loretta Fowler (b. 1833), whom he married in 1859, became sick, and she died soon after, in August 1865. The couple had two children, Clinton and George. In 1866 Calvin married Lucinda Fowler (b. 1849). They raised five children in Vermont and Massachusetts: Lucinda, Albert Henry Irish (1868-1958), Bessie, Wesley, and Fred. Albert Henry Irish married Nellie M. Finn in 1892. They lived in Massachusetts and had 4 children: Marion, Florence, Albert Eugene, and Fred.