I can only say that my unconnecting DI GREGORIO line
in Potenza city are also recorded as GREGORIO and SANGREGORIO.
I actually list them on my family history as SANGREGORIO but I find
them recorded these different ways. Be sure to check those variations
also DI GREGORIO and DE GREGORIO.
===
If your have Potenza the city lines, visit
http://genealogy.bio
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