His wife, and mother of son Martin, was named Edith. She is in the 1850 census listing cited below, age 47 born in North Carolina.
Sources
"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M4B9-CMW : 23 December 2020), Martin Summer in household of Martin Summer, Duplin Roads, Duplin, North Carolina, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
Son's marriage record names parents:
"North Carolina, County Marriages, 1762-1979 ," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QJ8B-RKXV : 6 November 2017), Martin Sumner and Mary A Pugh, 18 Nov 1869; citing Sampson, North Carolina, United States, p. , North Carolina State Archives Division of Archives and History; FHL microfilm 19,935.
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DNA Connections
It may be possible to confirm family relationships with Martin 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 Martin: