As discovered on FamilyTreeDNA.com, two descendants from William Allen, b1851 and Nancy Ann Tyler, b1859, share DNA.
Predicted Relationship: 2nd-4th cousins
Actual Relationship: 2nd cousins
Shared DNA: 134 cM across 10 segments
Path A: William & Nancy Allen -> Arelia Vera Allen, b1893 -> Janice Maureen Stanford, b1933 -> FamilyTreeDNA.com user John W. Finnell.
Path B: William & Nancy Allen -> Addison Andrew Allen, b1899 -> Gloria Charlene Allen, b1934 -> FamilyTreeDNA user Joel Etherton