Answer: According to Michael Dirr's "Manual of Woody Landscape Plants," Aurora is a variegated form of Liquidambar styraciflua and thus would not be a likely match. In my quick review I did not find any likely matches, however that does not mean the tree was never introduced at some time either in this country or elsewhere. It could also, of course, be a seedling.
You might want to consult with the Saratoga Horticultural Foundation to see if they might be able to help you identify it. They have introduced some named varieties of Liquidambar and thus might conceivably be familiar with this one. Their web site address is:
15185 Murphy Avenue
San Martin, CA 95046
Good luck with your quest.
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