Allen married Catharine Eisenhuth, daughter of William Eisenhuth and Sarah Gentzel. (Catharine Eisenhuth was born on 28 Feb 1841 in Haines Township, Centre, Pennsylvania, United States,1 2 3 died on 27 Jan 1913 in , Centre, PA 1 3 and was buried on 29 Jan 1913 in Spring Mills: Paradise Cemetery, Centre, Pennsylvania, United States 1 3.)
1 Ancestry.com, Pennsylvania, U.S., Death Certificates, 1906-1968 (Original data: Pennsylvania (State). Death certificates. 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 , https://familysearch.org/ark:/61903/1:1:M44B-BR6 William Eisenhuth, Haines and Penn, Centre, Pennsylvania.
3 , https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=128158181.