Only hours after making the comment about the mystery pollen parent of Honeycrisp, Nicholas Howard posted on FB NAFEX an e-article by Nature.com about DNA analysis and the subsequent sleuthing to deduce that parent.
MN1627 was the product of a cross of the ubiquitous Golden Delicious and Duchess of Oldenburg. The research did not seek markers for which was seed parent, but these were the two. MN1627 is no longer extant anywhere, according to U of Minn, and as of the posting, Apparently the U has contacted everyone who obtained MN1627 from them and no one indicates it is still living anywhere.
Duchess of Oldenburg gets some respect.