Allan Keith Conrad was born on 1919 in Ohio to Ray Dean Conrad (1888-1985) and Abbie Lydia Keith (1889-1972). 
Allan Keith Conrad married Elizabeth Mary Gottron (age 31, b. 1916 - d. 1990), daughter of Henry Philip Gottron (1885-1971) and Eulalia G. Favro (1887-1978), on 17 April 1948 in Sandusky County, Ohio. 
They had (at least) 1 child:
Keith Conrad Jr (15 September 1948 - 15 September 1948) Died Young. 
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4Q2-8QL : accessed 7 December 2021), Keith Conrad in household of R Dean Conrad, Delaware, Delaware, Ohio, United States; citing enumeration district (ED) ED 10, sheet 3B, line 85, family 86, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1790; FHL microfilm 2,341,524.
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It may be possible to confirm family relationships with Allan by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Allan: