The paternal relationship between Jakob Ferkel and his son
Heinrich Ferkel is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant KLF.
The segmental (via DNA segment triangulation) and total DNA shared between KLF and other confirmed descendants of
Johann Andreas Ferckel/
Elisabetha Katharina Krumrey is consistent with the expected ranges for their respective relationships. Since KLF descends from Johann Andreas Ferckel/Elisabetha Katharina Krumrey through Jakob Ferkel and his son Heinrich Ferkel, the presence of significant shared DNA between KLF and other known descendants of Johann Andreas Ferckel/Elisabetha Katharina Krumrey validates the generational links along this paternal line.
This supports the conclusion that DNA was passed from MRCA couple Johann Andreas Ferckel/Elisabetha Katharina Krumrey through Jakob Ferkel to Heinrich Ferkel, and ultimately to KLF, confirming this direct ancestral connection through multiple generations.