Hartwell married Effie M. F. Nedham of Groton, Massachusetts on October 23, 1877. They had two children Norcross N. Hartwell; and Harold H. Hartwell.[2]
^ abcdefghijklmnopCrane, Ellery Bicknell (1907), Historic Homes and Institutions and Genealogical and Personal Memoirs of Worcester County, Massachusetts: With a History of Worcester Society of Antiquity, Volume IV, New York, New York: Lewis Publishing Company, p. 123
^ abcCrane, Ellery Bicknell (1907), Historic Homes and Institutions and Genealogical and Personal Memoirs of Worcester County, Massachusetts: With a History of Worcester Society of Antiquity, Volume IV, New York, New York: Lewis Publishing Company, p. 124