The paternal relationship between Isaac Marlatt and his son William Marlatt is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant WM.

The segmental (via DNA segment triangulation) and total DNA shared between WM and other confirmed descendants of Peter Hammersley/Lydia Fuller is consistent with the expected ranges for their respective relationships. Since WM descends from Peter Hammersley/Lydia Fuller through Isaac Marlatt and his son William Marlatt, the presence of significant shared DNA between WM and other known descendants of Peter Hammersley/Lydia Fuller validates the generational links along this paternal line.

This supports the conclusion that DNA was passed from MRCA couple Peter Hammersley/Lydia Fuller through Isaac Marlatt to William Marlatt, and ultimately to WM, confirming this direct ancestral connection through multiple generations.