William B. Mack, b. 21 Jul 1862 in Woonsocket, Providence County, Rhode Island, d. 10 Jun 1933 in Aberdeen, Grays Harbor County, Washington, son of Jeremiah Mack & Mary Coffey.
William Barker Mack, b. 26 Jan 1852 in Bellows Falls, Windham County, Vermont, d. 14 Apr 1917 in Manchester, Hillsborough County, New Hampshire, son of William Franklin Mack & Elizabeth A. Barker. He married Evelyn M. Dennett on September 11, 1881 in Hollis, York County, Maine.
William Warren Mack, b. 14 Oct 1821 in Ira, Cayuga County, New York, d. 19 Jul 1901 in Rochester, Monroe County, New York, son of Amos Mack & Elisabeth "Betsey" E. Ingham.