West Chester Park (Now Massachusetts Avenue) broke Arthur Gilman's lettering scheme and you are also forgetting Charlesgate East, West, and whatever the stretch on the original Boylston Bridge where the Bowker Overpass is now, was named. Ispwich, Jersey, and Kilmarnock originally had different names and alignments on Olmstead's plans. At some point they went from planned generic Yankee names to the finally laid out Scottish/Welsh.
Audubon Road was also renamed to Park Drive in the 1930s when Arthur Shurcliff's changes to Olmstead's Fens eliminated most of the marshland and greatly curtailed the width of the muddy river in the park. The addition of formal parkland at the cost of marshland and waterway displaced a large number of birds. I guess someone at the Audubon Society thought trashing an unofficial bird sanctuary for a formal park made it necessary to take Audubon's name off the abutting road. When a travel lane was removed in the 1980s, to add additional street parking and the road was changed to one way, it really changed the feel of the parkway. Also cause a number of really bad accidents from people forgetting the changes and driving the wrong way into oncoming traffic.
Gaston Square, Boylston Square, the Westland Entrance, Huntington Entrance, Louis Pasteur Entrance, Tremont Entrance, and probably something else I forget, we also renamed, eliminated, or obliterated for traffic control changes around Fenway since then.
/Lurker loves renting to old ladies and responsible grad students on Park Drive