The Mantz family settled in Frederick, Maryland, around 1747. Charles Mantz (1807-1879) lived his entire life there and with his wife Mary Ann had children Isabel, Laura, Emma, Mary E., John E., Charles Gomber and Horatio McPherson ("Makie"). Charles G. Mantz (1853-1924) began his career as a bookkeeper in Omaha, Nebraska, was involved in the cattle business in Wyoming, conducted an investment and loan business in Fort Collins, Colorado from 1884-1892, and finally settled in Denver, Colorado. He married Caroline E. Armstrong, daughter of Andrew Armstrong of Fort Collins in 1891, and had children Charles A., Florence and Anna E. Mantz. Charles A. Mantz (1892-1970) was a successful Denver attorney. Horation McP. Mantz was a cattle dealer in Rock Creek, Wyoming in the 1880s.
Isabel Mantz married Dr. John Johnson; Emma Mantz married a Mr. Hottel; and Mary E. Mantz married Samuel Bean (1840-1883). Bean was involved in various business partnerships with Hottel, George Bean, Charles G. Mantz, and Horatio McP. Mantz in Omaha, Nebraska.
From the description of Papers, 1839-1973. (University of Wyoming, American Heritage Center). WorldCat record id: 27967033