The paternal relationship between Maurice Joseph Fitzgerald and his son MFF is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant MFF.

The segmental (via DNA segment triangulation) and total DNA shared between MFF and other confirmed descendants of John Sheehy/Elizabeth Drury is consistent with the expected ranges for their respective relationships. Since MFF descends from John Sheehy/Elizabeth Drury through Maurice Joseph Fitzgerald and his son MFF, the presence of significant shared DNA between MFF and other known descendants of John Sheehy/Elizabeth Drury validates the generational links along this paternal line.

This supports the conclusion that DNA was passed from MRCA couple John Sheehy/Elizabeth Drury through Maurice Joseph Fitzgerald to MFF, and ultimately to MFF, confirming this direct ancestral connection through multiple generations.