The paternal relationship between John Koepke and his daughter HK is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant BJ.
The segmental (via DNA segment triangulation) and total DNA shared between BJ and other confirmed descendants of
August Friedrich Ferdinand Pahlow/
Christine Sophia Mailahn is consistent with the expected ranges for their respective relationships. Since BJ descends from August Friedrich Ferdinand Pahlow/Christine Sophia Mailahn through John Koepke and his daughter HK, the presence of significant shared DNA between BJ and other known descendants of August Friedrich Ferdinand Pahlow/Christine Sophia Mailahn validates the generational links along this paternal line.
This supports the conclusion that DNA was passed from MRCA couple August Friedrich Ferdinand Pahlow/Christine Sophia Mailahn through John Koepke to HK, and ultimately to BJ, confirming this direct ancestral connection through multiple generations.