It may be possible to confirm family relationships with Christian August 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:
Holstein-Gottorp-39 and Holstein Gottorp-4 appear to represent the same person because: Found duplicates when I mapped WikiTree to WikiData
Christian August is 18 degrees from AJ Jacobs, 20 degrees from Jeanie Roberts, 14 degrees from Myles Standish and 9 degrees from Queen Elizabeth II Windsor on our single family tree. Login to find your connection.