The proposed relationship of Heinrich Ferkel as the father of
Hubert Jacob Ferkel and
Art Ferkel is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 2nd cousin, once removed relationship between KS (a descendant of the Art Ferkel ancestral line) and KLF (a descendant of the Hubert Jacob Ferkel ancestral line) with 103.59 cM of shared DNA across 4 HIR segments.
This match is consistent with their placement within these shared ancestral branches.