By all accounts, including the naval architects own words, our boat is a bastard.
I found an article out there, which I borrowed and put on this site, which explains that the Hans Christian 36 that we own was a maverick, and occupies a strange spot in the history of American cruising yachts.
The Union 36, Polaris 36, and Hans Christian 36 are all the same boat.
The mystery is solved! Our hull number is XSA000040675, which means we were one of the first Hans Christians, built by the Union Ship Company. After this, they were renamed to Union Polaris 36's.