Paternal relationship is confirmed with an AncestryDNA test match between Dan Brede and Judy Anderson, third cousins. Predicted relationship reported by AncestryDNA: Third Cousins based on sharing 141 centimorgans shared across 6 DNA segments; Confidence: Extremely High.
It may be possible to confirm family relationships with John by comparing test results with other
carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: