Allen married Catharine Eisenhuth, daughter of William Eisenhuth and Sarah Gentzel. (Catharine Eisenhuth was born on 28 February 1841 in Haines Township, Centre, Pennsylvania, United States,1 2 3 died on 27 January 1913 in , Centre, PA 1 3 and was buried on 29 January 1913 in Spring Mills: Paradise Cemetery, Centre, Pennsylvania, United States 1 3.)
1 Ancestry.com, Pennsylvania, Death Certificates, 1906-1963 (Original data: Pennsylvania (State). Death certificates, 1906–1963. Series 11.90 (1,905 cartons). Records of the Pennsylvania Department of Health, Record Group 11. Pennsylvania Historical and Museum Commission, Harrisburg, Pennsylvania.), Certificate 3976. Cathrine Allen. Father William Eisenhuth. Mother Sallie Genzle. Informant Angeline Eisenhuth.
2 1850 United States Census, https://familysearch.org/ark:/61903/1:1:M44B-BR6 William Eisenhuth, Haines and Penn, Centre, Pennsylvania.
3 Find A Grave, https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=128158181.