Montgomery Marshall was the son of Robert (1805-1878) and Susan Miller Marshall (1807-1841). He was christened Aug 30, 1839 at the Christ Evangelical Church of Germantown, which is located in Clermont, Columbia Co. New York. Brother to Anna Matilde Marshall (1833-1839), Delia Marshall Simmons (1837-?) and Matilde Marshall Boyce (1841-). Montgomery was also 1/2 Brother to Robert Marshall (1843-1891), Lucinda G Marshall Stickle (1849-) and Alice Marshall Ring (1857-1935) through his Father's second marriage to Hannah Smith. Montgomery Marshall and his first wife Alice Moore Marshall were the parents of 3 children.... Nellie Marshall Rivenburg (1862-1942), Theodore Marshall (1865-1954) and Minnie L Marshall Cornwell Mussen (1868-1949).

Montgomery Marshall and his second wife Margaret Annie Fraleigh Worden Marshall (1847-1910) were married on November 8, 1875 and had 6 children ... Clarence M Marshall (1876-1950), Sylvester Boyce Marshall (1877-?), Alice Marshall (1884-1887), Florence Marshall (1885-1885), Morton Marshall (1888-1901) and Gertrude M Marshall Clark (1890-?).

Montgomery Marshall served in the Civil War in the "Ulster Guard" Company R, NY 20th Militia Volunteers. This unit was given a 90 day service to protect the Nation's Capitol, Washington, D.C. Montgomery was recognized as a True Patriot on Nov 28th, 1866 by Brevet Major General John Watts DePeyster at the dedication of the Defender's Monument that stands proudly still in the Village of Tivoli. The Monument recognizes the men who gave their lives in the Slave Holders Rebellion (Civil War) and the dedication honored those that returned to the area.

Montgomery Marshall was, by profession, listed as a Blacksmith, like his Father Robert. He was also the first Police Constable for the Village of Tivoli.