Hi,
It looks like one of the most common white butterflies in the Western world at least, the Cabbage White. The caterpillars eat plants in the cabbage family.
They were imported, unintentionally, into the United States and now exist in every state.
See for example
https://greennature.com/new-jersey-butterflies/
Thanks Daniele and gratography...I am going with Pieris sp....at least the spotting now has a genus name till I can figure out the species epithet. Many thanks to you both.
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