Look up any reliable source on the grandchildren of Catherine II the Great and you will see that Saint Demitrius Gallitzin was not and will never be the grandchild of Catherine II the Great. You have not even named your source of information. You said that he "was said to be the grandson of Catherine the Great" with no proof where that statement came from. My source the Almanach de Gotha is irrefutable, so one must say that you simply do not know what you're talking about. You are certainly wrong or confused or both or your sources are wrong. Either way it will not change the fact that the Father of the Alleghenies was NEVER the grandson of Catherine II the Great.